Questions from Essentials of Statistics

Q: The data on domestic and overseas grosses for a random sample of

The data on domestic and overseas grosses for a random sample of 50 movies are on the WeissStats site. a. Decide whether you can reasonably apply the regression t-test. If so, then also do part (b). b...

Q: The data for lot size (in acres) and assessed value

The data for lot size (in acres) and assessed value (in thousands of dollars) for a sample of homes in a particular area are on the WeissStats site. a. Decide whether you can reasonably apply the regr...

Q: The data for home size (in square feet) and assessed

The data for home size (in square feet) and assessed value (in thousands of dollars) for the same homes are on the WeissStats site. a. Decide whether you can reasonably apply the regression t-test. If...

Q: The data for average high and low temperatures in January for a

The data for average high and low temperatures in January for a random sample of 50 cities are on the WeissStats site. a. Decide whether you can reasonably apply the regression t-test. If so, then als...

Q: The U.S. Census Bureau divides the states in the

The U.S. Census Bureau divides the states in the United States into four regions: Northeast (NE), Midwest (MW), South (SO), and West (WE). The following table gives the region of each of the 50 states...

Q: Use the data points given on the WeissStats site for shell thickness

Use the data points given on the WeissStats site for shell thickness and concentration of PCBs for 60 Anacapa pelican eggs. a. Decide whether you can reasonably apply the regression t-test. If so, the...

Q: Use the data on the WeissStats site for gas mileage and engine

Use the data on the WeissStats site for gas mileage and engine displacement for 121 vehicles. a. Decide whether you can reasonably apply the regression t-test. If so, then also do part (b). b. Decide,...

Q: Use the data on the WeissStats site for estriol levels of pregnant

Use the data on the WeissStats site for estriol levels of pregnant women and birth weights of their children. a. Decide whether you can reasonably apply the regression t-test. If so, then also do part...

Q: The data for volume, in cubic feet, and diameter at

The data for volume, in cubic feet, and diameter at breast height, in inches, for 70 shortleaf pines are on the WeissStats site. a. Decide whether you can reasonably apply the regression t-test. If so...

Q: Identify two graphs used in a residual analysis to check the Assumptions

Identify two graphs used in a residual analysis to check the Assumptions 1–3 for regression inferences, and explain the reasoning behind their use.