Free Essay

In: Other Topics

Submitted By ElReyUno

Words 777

Pages 4

Words 777

Pages 4

15.

CLASS 0 1 2 3 4 5 6

TALLEY II IIIII IIIII IIIII IIIII IIIII IIII IIIII III IIIII I IIII

FREQ 2 5 24 8 6 4 0

% 4% 10% 48% 16% 12% 8% 0%

Sidney Smith 01/24/2015 CH 2 HW Statistics 7 I 1 50 2% 100%

19.

CLASS 10-19 20-29 30-39 40-49 50-59 60-69 70-79

TALLEY II IIIII IIIII IIIII I IIIII IIIII IIIII II IIIII IIIII IIIII I

FREQ 0 2 16 17 10 5 1 51

% 0% 4% 31% 33% 20% 10% 2% 100%

2-2 1. 102 students do not have to enroll in the summer program.

Histogram

150 Frequency 100 50 0 1 2 3 Bin 4 5 More Frequency

Frequency Polygon

150 Frequency 100 50 0 1 2 Bin 3 4 5 Series2

Sidney Smith 01/24/2015 CH 2 HW Statistics

Ogive

150 Frequency 100 50 0 1 2 Bin 3 4 5 Series2 Series1

3. The majority of the states have 25 to 75 counties within them (I’m thankful it cumulated to 50…phew).

Sidney Smith 01/24/2015 CH 2 HW Statistics

4. 5.

Sidney Smith 01/24/2015 CH 2 HW Statistics

4. The distribution of faculty has a positive (increasing) distribution. 12 schools have more than 180 faculty.

Sidney Smith 01/24/2015 CH 2 HW Statistics

Sidney Smith 01/24/2015 CH 2 HW Statistics

7.

CLASS 21-29 30-38 39-47 48-56 57-65 66-74 75-83 LOWER MIDPOINT BOUND 25 34 43 52 61 70 79 UPPER BOUND 20.5 29.5 38.8 47.5 56.5 65.5 74.5 29.5 38.5 47.5 56.5 65.5 74.5 83.5 CUM FREQ FREQ 5 10 13 10 4 3 1

5 15 28 38 42 45 46

FREQ

14 12 10 8 6 4 2 0 21-29 30-38 39-47 48-56 57-65 66-74 75-83 FREQ

Sidney Smith 01/24/2015 CH 2 HW Statistics

FREQ

FREQ

21-29

30-38

39-47

48-56

57-65

66-74

75-83

CUM FREQ

50 45 40 35 30 25 20 15 10 5 0 0 20 40 60 80 100

CUM FREQ

2-3 1.

Sidney Smith 01/24/2015 CH 2 HW Statistics

4.

CONTINENT NORTH AMERICA EUROPE ASIA SOUTH AMERICA AUSTRALIA AFRICA FREQ 643 413 315 45 22 17

Sidney Smith 01/24/2015 CH 2 HW Statistics

PARETO

700 600 500 400 300 200 100 0

FREQ

Sidney Smith 01/24/2015 CH 2 HW Statistics 6.

12.…...

Premium Essay

...CHAPTER 3 Describing Data: Numerical Multiple-Choice Questions 1. A scatter plot can illustrate all of the following except: A) The median of each of the variables. B) The range of each of the variables. C) An indication of outliers. D) Patterns of values. ANSWER: A 2. For the following scatter plot, what would be your best estimate of the correlation coefficient? A) -0.8 B) -1.0 C) -0.3 D) 0.0 ANSWER: A 3. For the following scatter plot, what would be your best estimate of the correlation coefficient? A) 1.0 B) 0.8 C) 0.3 D) 0.0 ANSWER: B 4. Calculate the correlation for the following (X, Y) data: (53, 37), (34, 26), (10, 29), (63, 55), (28, 36), (58, 48), (28, 41), (50, 42), (39, 21), and (35, 46). A) 0.710 B) 100.6 C) 0.670 D) 0.590 ANSWER: D 5. Suppose that we are interested in exploring the determinants of successful high schools. One possible measure of success might be the percentage of students who go on to college. The teachers’ union argues that there should be a relationship between the average teachers’ salary and high school success. The following equation of the regression line is obtained: “% of students going on to college = 13 + 0.001Average Teachers’ Salary” Which of the following statements is true? A) Increase % of students going on to college by 0.001 percent, we would expect average......

Words: 12884 - Pages: 52

Free Essay

...Katie White Statistics Week 1 (Chapter 1 & 2) Chapter 1 2. a) Ratio b) Nominal c) Interval d) Ordinal 4. a) Sample b) Population c) Population d) Sample 6. A sample is a portion or part of the population of interest. While population is the entire set of individuals or objects of interest or the measurements obtained from all individuals or object of interest. 8. a) Population would be used to get the overall average grade for the course. b) Sample would be used because a large corporation over the past ten years would be way to information to locate and take way too long. c) Sample of each because of the amount of information you are giving you don’t have to go into deep detail on each one. d) Population to get exact number to make sure it all can be stored on the iPod. 10. Name: Nominal Number of mins used: Ratio Satisfaction: Ordinal Chapter 2 2. 3 Classes. iPod, iRiver and Magic Star MP3 8. 26=64 therefore 6 classes. i > $29 - $0 / 6 = 4.8 class intervals of 5 12. a) 5 classes b) 10 intervals c) 50 d) Chart below e) Chart below # of Visits | Frequency | Relative Frequency | 50 -60 | 4 | 4/20=.2 | 61 -70 | 6 | 6/20=.3 | 71 - 80 | 5 | 5/20=.25 | 81 - 90 | 2 | 2/20=.1 | 91- 100 | 3 | 3/20=.15 | Total | 20 | | 16. a) 5 patients b) 20-30 Days c) 30 Days d) 3 e) Frequency Polygon ...

Words: 254 - Pages: 2

Premium Essay

...TERM END EXAMINATIONS,MARCH-2013 BACHELOR OF COMMERCE, YEAR – III ELEMENTARY STASTISTICS Time: 3 hours M.Marks:60 SECTION A Note: - Attempt any 4 questions. All questions carry equal marks. (4 X 5) The answer should be limited upto 200 words. 1) What is statistics? Explain the nature and limitations of statistics? 2) What is frequency distribution? What are the different types of frequency distribution? 3) What is frequency curve? Explain cumulative frequency curve with example? 4) Suppose mean of a series of 5 item is30.four values are respectively, 10, 15, 30 and 35.estimate the missing 5th value of the series. ANSWER : Mean = (10+15+30+35+x)/5=30 Therefore, x=(30*50)-( 10+15+30+35) i.e x = 150-90, hence x=60 5) Calculate median of the following distribution of data. Class interval | 0-5 | 5-10 | 10-20 | 20-30 | 30-50 | 50-70 | 70-100 | frequency | 12 | 15 | 25 | 40 | 42 | 14 | 8 | n= 12+15+25+40+42+14+8=156 Hence median is at the average of n/2 & (n/2 +1) positon i.e 78th & 79th position Class interval | 0-5 | 5-10 | 10-20 | 20-30 | 30-50 | 50-70 | 70-100 | frequency | 12 | 15 | 25 | 40 | 42 | 14 | 8 | Position 12 27 52 92 134 148 156 6) Calculate the coefficient of correlation...

Words: 1424 - Pages: 6

Premium Essay

...MARCH-2013 BACHELOR OF COMMERCE, YEAR – III ELEMENTARY STASTISTICS Time: 3 hours M.Marks:60 SECTION A Note: - Attempt any 4 questions. All questions carry equal marks. (4 X 5) The answer should be limited upto 200 words. 1) What is statistics? Explain the nature and limitations of statistics? 2) What is frequency distribution? What are the different types of frequency distribution? 3) What is frequency curve? Explain cumulative frequency curve with example? 4) Suppose mean of a series of 5 item is30.four values are respectively, 10, 15, 30 and 35.estimate the missing 5th value of the series. 5) Calculate median of the following distribution of data. Class interval | 0-5 | 5-10 | 10-20 | 20-30 | 30-50 | 50-70 | 70-100 | frequency | 12 | 15 | 25 | 40 | 42 | 14 | 8 | 6) Calculate the coefficient of correlation between the age of husbands and wives: Age of husband (yrs) | 21 | 22 | 28 | 32 | 35 | 36 | Age of wives (yrs) | 18 | 20 | 25 | 30 | 31 | 32 | SECTION B Note: -All questions are compulsory. Each Question carries equal mark. (40 X 1) 1) If a statistical series is divided into four equal parts, the end value of each part is called a ……… a. Quartile b. Deciles c. Percentiles d. Range 2) ………………divide the series into 100......

Words: 1339 - Pages: 6

Premium Essay

...AP stands for “Additional Problem.” “AP21” is additional problem 1 from chapter 2. The additional problems for the Markets material is after the AP for chapter 12. Chapter 2 AP21 When is revenue recognized by a corporation? When the corporation designs a project. When the corporation mass produces a product. When the customer orders a product. When the product is delivered to the customer and the customer promises to pay When the customer fulfills his promise in item #d above by paying the cash to the corporation. When the corporation receives a cash deposit from a customer for a product to be delivered next month. When the right of return expires. The corporation sells thousands of small lawn mowers. Answer d. When the product is delivered to the customer and the customer promises to pay Explanation: The FASB’s definition of a revenue is “Inflows or other enhancements of assets of an entity or settlements of its liabilities during a period from delivering or producing goods, rendering services, or other activities that constitute the entity's ongoing major or central operations.” A common-sense explanation is that revenue is recognized when it is “earned and receivable.” Delivery is normally the time period in which revenue is recognized. There are three exceptions. If the collection of cash is highly uncertain, revenue is recorded at the time cash is received. If the level of returns is highly uncertain, revenue is recognized when the right to......

Words: 566 - Pages: 3

Premium Essay

...Task 6 Statistics II February 4th 2013 A. Excel is used generate a random number using the RANDBETWEEN(1,4) method. Please see part A below. 1. To generate this sample from the whole population of job applicants, using Excel and the method RANDBETWEEN(1,4) the number 2 was generated. The RANDBETWEEN(1,4) method uses an algorithm to generate a random number. This method generates a large number using a seed that is based on the time noted in the computer time. This number is then reduced to the specified 1, 2, 3, or 4 using the mod 3 + 1. Using the random list that was provided, I was able to use systematic sampling to select every second data value and generated a sample. To do this, I started with the second number, in the random list provided, and then picked every second number to generate a sample that was 50 numbers large (shown above). B. 1,2,3 Using excel and the methods STDEV(), AVERAGE(), MODE(), and MEDIAN() so that the standard deviation, mean/average, mode and median are calculated. Examples of these are shown below for unsuccessful applicants the process is the same for successful applicant using the other data set. To find the mean using the AVERAGE method, Excel finds the sum of all the numbers selected and divides them by the number of data points, in this case 50. Example Mean: n=1n=50Xn=2184 Where Xn=Unsuccessful applicant Mean=218450=43.68 For the MODE() method, Excel looks over all the data that is selected and finds the value...

Words: 2290 - Pages: 10

Premium Essay

...Statistics formula sheet Summarising data Sample mean: x= Sample variance: s2 x 1 = n−1 n This has mean nθ and variance nθ(1 − θ). The Poisson distribution: p(x) = λx exp(−λ) for x = 0, 1, 2, . . . . x! 1 n n This has mean λ and variance λ. xi . i=1 Continuous distributions n Distribution function: x2 i − nx 2 i=1 1 (xi − x) = n−1 2 . F (y) = P (X ≤ y) = y i=1 f (x) dx. −∞ Sample covariance: g= 1 n−1 n Density function: 1 n−1 n (xi −x)(yi −y) = i=1 xi yi − nx y i=1 . f (x) = Evaluating probabilities: d F (x). dx Sample correlation: r= g . sx sy b P (a < X ≤ b) = a f (x) dx = F (b) − F (a). Probability Addition law: P (A ∪ B) = P (A) + P (B) − P (A ∩ B). Multiplication law: P (A ∩ B) = P (A)P (B|A) = P (B)P (A|B). Partition law: For a partition B1 , B2 , . . . , Bk k k Expected value: ∞ E(X) = µ = −∞ xf (x) dx. Variance: ∞ ∞ Var(X) = −∞ (x − µ)2 f (x) dx = −∞ x2 f (x) dx − µ2 . Hazard function: h(t) = P (A|Bi )P (Bi ). i=1 f (t) . 1 − F (t) P (A) = i=1 P (A ∩ Bi ) = Normal density with mean µ and variance σ 2 : 1 f (x) = √ exp 2πσ 2 . Weibull density: f (t) = λκtκ−1 exp(−λtκ ) for t ≥ 0. Exponential density: − 1 2 x−µ σ 2 Bayes’ formula: P (A|Bi )P (Bi ) P (Bi |A) = = P (A) P (A|Bi )P (Bi ) k i=1 for x ∈ [−∞, ∞]. P (A|Bi )P (Bi ) Discrete distributions Mean value: E(X) = µ = xi ∈S f (t) = λ exp(−λt) for t ≥ 0. xi p(xi ). This......

Words: 957 - Pages: 4

Premium Essay

...Chapter 2/Fundamental Economic Concepts Chapter 2 Fundamental Economic Concepts Solutions to Exercises 1. The number of checked bags should fall, as individuals internalize the external cost of added weight. However, the average weight should rise, as those checking bags would in all likelihood pack as much as possible to make up for the cost. 2. The wage in the market for oil spill cleanup efforts should rise, thanks to an increase in demand for labor. The wage in the market for similarly-skilled labor should also fall, as the relevant labor supply falls in response to the previous increase in wage. We would expect an increase in migration, as long as the wage of the home market was less than the wage that could be received in the Gulf region. 3. Projects A, C, G and B require a total of $875 million in investment. Project B, the lowest return project of this group is expected to generate an 18 percent rate of return. Ajax can raise up to $1,050 million, with the highest cost being 18 percent for the last $200 million. If Ajax were to choose any project beyond A, C, G, and Bsuch as project D (the next best project after B)that project would generate a marginal rate of return (16 percent), which is less than the marginal cost of funds needed to finance it, in this case 18 percent for the last $200 million up to a total of $1,050. Thus, the optimal capital budget is to invest in projects A, C, G, B, for a total of $875 million. 4. This question examines expected......

Words: 1045 - Pages: 5

Free Essay

...STUDY QUESTIONS * 1. Identify the variables that are measured at the nominal level in Table 1. * 2. Is age measured at the nominal level? Provide a rationale for your answer. * 3. What is the mode for marital status in the total sample and in the depressed group? * 4. How many of the depressed persons were unemployed? Would you have expected this finding? Provide a rationale for your answer. * 5. How many of the depressed persons were married? Would you have expected this finding? Provide a rationale for your answer. * 6. No depression was reported in the 29 to 38 age group. What are the possible reasons for this? * 7. How many subjects and what percentage of the total sample were 49 years of age or older? Round your answer to the nearest tenth of a percent (%). * 8. Nominal data categories should be exhaustive. In looking at Ethnicity in Table 1, are these ethnic categories exhaustive? Provide a rationale for your answer. * 9. For which variables in this table can a median be calculated? What does this tell us about the level of measurement of the variables? * 10. Are parametric or nonparametric statistical analysis techniques used to analyze nominal level data? Provide a rationale for your answer. ANSWERS TO STUDY QUESTIONS * 1. In Table 1, gender, ethnicity, marital status, and employment status were measured at the nominal level. * 2. No, the age categories can be rank ordered and are therefore an example of ordinal level of......

Words: 732 - Pages: 3

Premium Essay

...2. Oil and gas sector This chapter begins with an overview of the oil and gas industry in Malaysia. Description of the value chain of the industry is given in section 2.2, followed by the industry’s economic performance in section 2.3. Section 2.4 focuses on the scope of the inquiry regarding issues in the oil and gas industry. 2.1 Oil and gas industry in Malaysia This section provides an overview of the oil and gas industry in Malaysia. 2.1.1 History Oil and gas production have been a mainstay of Malaysia’s growth since oil was first drilled in 1910 in Miri, Sarawak. The first oil well (known as The Grand Old Lady) which was discovered by Shell, started with a production of 83 barrels per day (bbls/d) and reached a maximum of 15,000 bbls/d in 1929. There were no other drilling activities elsewhere in Borneo or Peninsular Malaya until the 1950s. [1, 2, 3] Petroleum activities began increasing significantly in 1960s due to the discovery and development of offshore fields in Borneo. The late 1960s saw the beginning of offshore oil exploration in the east coast of Peninsular Malaysia. In the 1970s, some oil fields in Malaysia were producing 90,000 to 99,000 bbls/d. [2] In the early days, foreign oil companies dominated the oil and gas industry in Malaysia with Shell and Esso being the two major players. This was followed by several other foreign companies such as Conoco, Mobil, Aquitaine, Oceanic and Teiseki. The national company, Petronas came on to the scene......

Words: 6202 - Pages: 25

Free Essay

...CHAPTER TWO DESCRIPTIVE STATISTICS: TABULAR AND GRAPHICAL METHODS CHAPTER OUTLINE AND REVIEW In Chapter 1, you were introduced to the concept of statistics and in exercise *6 of that chapter you were given a frequency distribution of the ages of 180 students at a local college, but you were not told how this frequency distribution was formulated. In Chapter 2 of your text, you were informed how such frequency distributions could be formulated and were introduced to several tabular and graphical procedures for summarizing data. Furthermore, you were shown how crosstabulations and scatter diagrams can be used to summarize data for two variables simultaneously. The terms that you should have learned from this chapter include: A. Qualitative Data: Data that are measured by either nominal or ordinal scales of measurement. Each value serves as a name or label for identifying an item. B. Quantitative Data: Data that are measured by interval or ratio scales of measurement. Quantitative data are numerical values on which mathematical operations can be performed. C. Bar Graph: A graphical method of presenting qualitative data that have been summarized in a frequency distribution or a relative frequency distribution. D. Pie Chart: A graphical device for presenting qualitative data by subdividing a circle into sectors that correspond to the relative frequency of each class. 23 24 Chapter......

Words: 6692 - Pages: 27

Premium Essay

...Solutions to Accompany Information Technology Project Management, Seventh Edition ISBN-10: 1133526853 ISBN-13: 978-1133526858 Course Technology MIS Series Kathy Schwalbe, Ph.D., PMP Created November 27, 2012 Table of Contents CHAPTER 1 2 CHAPTER 2 4 CHAPTER 3 6 CHAPTER 4 7 CHAPTER 5 14 CHAPTER 6 20 CHAPTER 7 25 CHAPTER 8 30 CHAPTER 9 33 CHAPTER 10 36 CHAPTER 11 38 CHAPTER 12 41 CHAPTER 13 43 APPENDIX A 44 APPENDIX B 49 APPENDIX C 50 List of solution files available and referenced in this document, in alphabetical order: CHAPTER 1 Introduction to Project Management DISCUSSION QUESTIONS 1. Why is there a new or renewed interest in the field of project management? More and more projects are being done by a variety of organizations. The projects are more complex and often involve the use of new technologies. Organizations are struggling to find better ways to manage their projects. 2. What is a project, and what are its main attributes? How is a project different from what most people do in their day-to-day jobs? What is the triple constraint? What other factors affect a project? A project is “a temporary endeavor undertaken to create a unique product, service, or result” (PMBOK Guide, 2012). In addition to being temporary and unique, other attributes of projects are that they are developed using progressive elaboration, require resources from various areas, should have a primary customer or sponsor,......

Words: 17532 - Pages: 71

Premium Essay

...following questions and problems from Chapter 2. Please submit your complete assignment in the course room by the due date. Chapter 2 Problems 2-1) An investor recently purchased a corporate bond that yields 9%. The investor is in the 36% combined federal and state tax bracket. What is the bond’s after-tax yield? 9% (1-T) = 9%(1-.36) =5.76% 2-2) Corporate bonds issued by Johnson Corporation currently yield 8%. Municipal bonds of equal risk currently yield 6%. At what tax rate would an investor be indifferent between these two bonds? 8% (1-T) + after tax corporate yield 6% - municipal tax exempt yield 8%(1-T) = 6% 8-8T+66 2=8t T=2/8 or 25% 2-7) The Talley Corporation had a taxable income of $365,000 from operations after all operating costs but before (1) interest charges of $50,000, (2) dividends received of $15,000, (3) dividends paid of $25,000, and (4) income taxes. What are the firm’s income tax liability and its after-tax income? What are the company’s marginal and average tax rates on taxable income? Income after operating costs: $365,000.00 Less: Interest Expense -$50,000.00 Plus: Taxable Dividends Received $4,500.00 Only 30% of the $15,000 in dividends are taxable. Taxable Income: $319,500.00 $319,500 falls into the $100,000 to $335,000 bracket so the corporate tax would be: $22,250 + .39 ($319,500 - $100,000) Tax Liability = $107,855.00 Average Tax Rate = $107,855/$319,500 = 33.76% 2-9) The Shrieves Corporation has......

Words: 847 - Pages: 4

Premium Essay

...Chapter 2 REVIEW OF RELATED LITERATURE AND STUDIES This chapter represents the review on related literature and studies regarding topic about the students who plays MOBA games (Multiplayer Online Base Arena) and its effect to their study habits and time management. Studies on productivity provided ideas as to how to design our own study, while the studies on work breaks gave us an idea of how merely not working for a segment would affect our study. This would mean that we could have a clear idea of the effect of the games themselves rather than merely the break. Foreign Literature A paper made by Thomas M. Connollya, Elizabeth A. Boylea, Ewan MacArthura, Thomas Haineya, James M. Boyleb from University of the West of Scotland, High St., Paisley PA1 2BE, Scotland, United Kingdom and University of Strathclyde, Glasgow, Scotland, United Kingdom with a title of “A systematic literature review of empirical evidence on computer games and serious games” examines the literature on computer games and serious games in regard to the potential positive impacts of gaming on users aged 14 years or above, especially with respect to learning, skill enhancement and engagement. Search terms identified 129 papers reporting empirical evidence about the impacts and outcomes of computer games and serious games with respect to learning and engagement and a multidimensional approach to categorizing games was developed. The findings revealed that playing computer games is linked to a range...

Words: 3493 - Pages: 14

Free Essay

...Chapter 2 Problems 1. Look at the newspapers for the past few days. What new economic statistics have been released? How do you interpret these statistics? Poverty levels in the US will continue to rise as long term unemployment numbers continue to increase. The societal problems that are associated with high unemployment will continue to increase. 2. A farmer grows a bushel of wheat and sells it to a miller for $1.00. The miller turns the wheat into flour and then sells the flour to a baker for $3.00. The baker uses the flour to make bread and sells the bread to an engineer for $6.00. The engineer eats the bread. What is the value added by each person? What is GDP? Farmer’s VA = $1 Miller’s VA = $2 Baker’s VA = $3 GDP = $6 3. Suppose a woman marries her butler. After they are married, her husband continues to support him as before (but as a husband rather than as an employee). How does the marriage affect GDP? How should it affect GDP? GDP is affected because the husband is no longer employed and GDP will be reduced minus his salary. 4. Place each of the following transactions in one of the four components of expenditure: consumption, investment, government purchases, and net exports. a. Boeing sells an airplane to the Air Force. Government purchases b. Boeing sells an airplane to American Airlines. Investment c. Boeing sells an airplane to Air France. Net exports d. Boeing sells an airplane to Amelia Earhart. Consumption ...

Words: 1238 - Pages: 5