# Question

Suppose you convert y = income from British pounds to dollars, and suppose a pound equals 2.00 dollars.

a. Explain why the y values double, the mean of y doubles, the deviations (y - ) double, and the standard deviation sy doubles.

b. Using the formula for calculating the correlation, explain why the correlation would not change value.

a. Explain why the y values double, the mean of y doubles, the deviations (y - ) double, and the standard deviation sy doubles.

b. Using the formula for calculating the correlation, explain why the correlation would not change value.

## Answer to relevant Questions

For the 100 cars on the lot of a used-car dealership, would you expect a positive association, negative association, or no association between each of the following pairs of variables? Explain why. a. The age of the car and ...The previous problem discusses GDP, which is a commonly used measure of the overall economic activity of a nation. For this group of nations, the GDP data have a mean of 1771 and a standard deviation of 2781 (in billions of ...Each month, the owner of Fay’s Tanning Salon records in a data files the monthly total sales receipts and the amount spent that month on advertising. a. Identify the two variables. b. For each variable, indicate whether it ...Zagat restaurant guides publish ratings of restaurants for many large cities around the world (see www.zagat.com). The review for each restaurant gives a verbal summary as well as a 0- to 30-point rating of the quality of ...In an introductory statistics course, x = midterm exam score and y = final exam score. Both have mean = 80 and standard deviation = 10. The correlation between the exam scores is 0.70. a. Find the regression equation. b. ...Post your question

0