Questions from Essentials of Statistics

Q: Ideally, in stratified sampling, the members of each stratum should

Ideally, in stratified sampling, the members of each stratum should be relative to the characteristic under consideration.

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. Use the technology of your choice to a. decide whether use of the linear correlation coefficient...

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. Use the technology of your choice to a. decide whet...

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. Use the technology of your choice to a. decide whether use of the li...

Q: A quantitative data set has size 60. At least how many

A quantitative data set has size 60. At least how many observations lie within three standard deviations to either side of the mean?

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. Use the technology of your choice to a. decide whether use of the linear correlat...

Q: −3 and 4 a. determine whether it slopes upward

−3 and 4 a. determine whether it slopes upward, slopes downward, or is horizontal, without graphing the equation. b. find its equation. c. use two points to graph the equation.

Q: The data on shell thickness and concentration of PCBs for 60 Anacapa

The data on shell thickness and concentration of PCBs for 60 Anacapa pelican eggs are on the WeissStats site. Use the technology of your choice to a. decide whether use of the linear correlation coeff...

Q: The data for per capita income and per capita beer consumption for

The data for per capita income and per capita beer consumption for the 50 states and Washington, D.C.. are on the WeissStats site. Use the technology of your choice to a. decide whether use of the lin...

Q: The data for gas mileage and engine displacement for 121 vehicles are

The data for gas mileage and engine displacement for 121 vehicles are provided on the WeissStats site. Use the technology of your choice to a. decide whether use of the linear correlation coefficient...