Questions from Essentials of Statistics

Q: We provided data on age and price for a sample of 11

We provided data on age and price for a sample of 11 Orions between 2 and 7 years old. On the WeissStats site, we have given the ages and prices for a sample of 31 Orions between 1 and 11 years old. a...

Q: In the paper “Mating System and Sex Allocation in the Gregarious

In the paper “Mating System and Sex Allocation in the Gregarious Parasitoid Cotesia glomerata” (Animal Behaviour, Vol. 66, pp. 259–264), H. Gu and S. Dorn reported on various aspects of the mating sys...

Q: y = 6 − 7x a. find the y-

y = 6 − 7x a. find the y-intercept and slope. b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation. c. use two points to graph the equation.

Q: Apply the empirical rule to solve each exercise. The data

Apply the empirical rule to solve each exercise. The data set has mean 10 and standard deviation 3. Fill in the following blanks: a. Approximately 68% of the observations lie between ___ and ____. b....

Q: How important are birdies (a score of one under par on

How important are birdies (a score of one under par on a given golf hole) in determining the final total score of a woman golfer? From the U.S. Women’s Open website, we obtained data on number of bird...

Q: The Information Please Almanac provides data on the ages at inauguration and

The Information Please Almanac provides data on the ages at inauguration and of death for the presidents of the United States. We give those data on the WeissStats site for those presidents who are no...

Q: Box Office Mojo collects and posts data on movie grosses. For

Box Office Mojo collects and posts data on movie grosses. For a random sample of 50 movies, we obtained both the domestic (U.S.) and overseas grosses, in millions of dollars. The data are presented on...

Q: The document Arizona Residential Property Valuation System, published by the Arizona

The document Arizona Residential Property Valuation System, published by the Arizona Department of Revenue, describes how county assessors use computerized systems to value single-family residential p...

Q: On the WeissStats site are data on home size (in square

On the WeissStats site are data on home size (in square feet) and assessed value (in thousands of dollars) for the same homes. a. Obtain a scatterplot for the data. b. Decide whether finding a regress...

Q: In the article, “Ghost of Speciation Past” (Nature

In the article, “Ghost of Speciation Past” (Nature, Vol. 435, pp. 29–31), T. Kocher looked at the origins of a diverse flock of cichlid fishes in the lakes of southeast Africa. Suppose that you wanted...