Questions from Statistics Principles

Q: Researchers had a car traveling 10 miles per hour collide into the

Researchers had a car traveling 10 miles per hour collide into the rear bumper of an SUV and recorded the amount of damage, in dollars. The data are below. Do the given data suggest the repair cost of...

Q: In their book SuperFreakonomics, authors Steven Levitt and Stephen Dubner describe

In their book SuperFreakonomics, authors Steven Levitt and Stephen Dubner describe the research of behavioral economist John List. List recruited customers and dealers at a baseball-card show to parti...

Q: A pit boss is concerned that a pair of dice being used

A pit boss is concerned that a pair of dice being used in a craps game is not fair. The distribution of the expected sum of two fair dice is as follows: The pit boss rolls the dice 400 times and recor...

Q: A researcher wanted to determine if the distribution of educational attainment of

A researcher wanted to determine if the distribution of educational attainment of Americans today is different from the distribution in 2000. The distribution of educational attainment in 2000 was as...

Q: The Harris Poll asked a random sample of adult Americans, “

The Harris Poll asked a random sample of adult Americans, “How important are moral values when deciding how to vote?” The results of the survey by disclosed political affiliation are shown in the tabl...

Q: The General Social Survey regularly asks individuals to disclose their religious affiliation

The General Social Survey regularly asks individuals to disclose their religious affiliation. The following data represent the religious affiliation of young adults, aged 18 to 29, in the 1970s, 1980s...

Q: Many municipalities are passing legislation that forbids smoking in restaurants and bars

Many municipalities are passing legislation that forbids smoking in restaurants and bars. Bar owners claim that these laws hurt their business. Are their concerns legitimate? The following data repres...

Q: State the requirements to perform inference on a simple least-squares

State the requirements to perform inference on a simple least-squares regression line.

Q: Crickets make a chirping noise by sliding their wings rapidly over each

Crickets make a chirping noise by sliding their wings rapidly over each other. Perhaps you have noticed that the number of chirps seems to increase with the temperature. The following table lists the...

Q: The following data represent the height (inches) of boys between

The following data represent the height (inches) of boys between the ages of 2 and 10 years. (a) Treating age as the explanatory variable, determine the estimates of /. What is the mean height of a 7-...