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Qnt 561 Week 5 Weekly Learning Assessments - Assignment

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Chapter 13 Exercise 6
The owner of Maumee Ford-Mercury-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.
Car Age (years) Selling Car Age (years) Selling Price ($000) Price ($000)
1 9 8.1 7 8 7.6
2 7 6.0 8 11 8.0
3 11 3.6 9 10 8.0
4 12 4.0 10 12 6.0
5 8 5.0 11 6 8.6
6 7 10.0 12 6 8.0
a. If we want to estimate selling price on the basis of the age of the car, which variable is the dependent variable and which is the independent variable? b-1. Determine the correlation coefficient. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) b-2. Determine the coefficient of determination. (Round your answer to 3 decimal places.)
c. Interpret the correlation coefficient. Does it surprise you that the correlation coefficient is negative? (Round your answer to nearest whole number.)

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Chapter 13 Exercise 12
The Student Government Association at Middle Carolina University wanted to demonstrate the relationship between the number of beers a student drinks and his or her blood alcohol content (BAC). A random sample of 18 students participated in a study in which each participating student was randomly assigned a number of 12-ounce cans of beer to drink. Thirty minutes after they consumed their assigned number of beers, a member of the local sheriff’s office measured their blood alcohol content. The sample information is reported below. Student Beers BAC Student Beers BAC
1 6 0.1 10 3 0.07
2 7 0.09 11 3 0.05
3 7 0.09 12 7 0.08
4 4 0.1 13 1 0.04
5 5 0.1 14 4 0.07
6 3 0.07 15 2 0.06
7…...

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