Questions from Statistics Principles

Q: Again referring to Exercise 11.51, find the sample correlation

Again referring to Exercise 11.51, find the sample correlation coefficient between age and selling price. What proportion of the variability in price is explained by the fitted straight line? Comment...

Q: The calculations involved in a regression analysis become increasingly tedious with larger

The calculations involved in a regression analysis become increasingly tedious with larger data sets. Access to a computer proves to be of considerable advantage. We repeat here a computer based analy...

Q: Consider the data on wolves in the Data Bank concerning body length

Consider the data on wolves in the Data Bank concerning body length (cm) and weight (lb). Calculate the correlation coefficient r and r2 for (a) All wolves. (b) Male wolves. (c) Female wolves. (d)...

Q: Consider the data on all of the wolves in the Data Bank

Consider the data on all of the wolves in the Data Bank concerning body length ( cm) and weight (lb). Using MINITAB or some other software program: (a) Plot weight versus body length. (b) Obtain the...

Q: Refer to Exercise 11.56 and a least squares fit using

Refer to Exercise 11.56 and a least squares fit using the data on all of the wolves in Table D.9 of the Data Bank concerning body length (cm) and weight (lb). There is one obvious outlier, row 18 with...

Q: For each data set, calculate s2. (a)

For each data set, calculate s2. (a) 1 4 3 2 2 (b) -2 1 -1 - 3 0 -2 (c) 9 8 8 9 8 8 9

Q: The least squares fit of polar bear weight to body length is

The least squares fit of polar bear weight to body length is obtained in Example 5. Taking skull length instead of body length, the summary statistics for y = weight and x = skull length, based on Tab...

Q: Use MINITAB or some other software program to regress the marine growth

Use MINITAB or some other software program to regress the marine growth on freshwater growth for the fish growth data of the Data Bank. Do separate regression analyses for: (a) All fish. (b) Males....

Q: Use MINITAB or some other software to obtain the scatter diagram,

Use MINITAB or some other software to obtain the scatter diagram, correlation coefficient, and the regression line of the final time to run 1.5 miles on the initial times given in the Data Bank.

Q: The data on the maximum height (feet) and top speed

The data on the maximum height (feet) and top speed (mph) of the 12 highest roller coasters, displayed in the chapter opener, are (a) Use MINITAB or some other software program to determine the propor...