Questions from Statistics

Q: What is an exponential scale, and when is such a scale

What is an exponential scale, and when is such a scale useful?

Q: The states of Alabama, Alaska, Arizona, Arkansas, California

The states of Alabama, Alaska, Arizona, Arkansas, California, Colorado, and Connecticut have the following areas in square miles (land and water), with the areas listed in the same order as the states...

Q: The contents of cans of regular Coca-Cola vary slightly in

The contents of cans of regular Coca-Cola vary slightly in weight. Here are the measured weights of seven cans, in pounds: 0.8161 0.8194 0.8165 0.8176 0.7901 0.8143 0.8126 a. Find the mean and median...

Q: Suppose you have scores of 80, 84, 87, and

Suppose you have scores of 80, 84, 87, and 89 on quizzes in a mathematics class. a. What is the mean of these scores? b. What score would you need on the fifth quiz to have an overall mean of 88? c. I...

Q: Suppose you have scores of 60, 70, 65, 85

Suppose you have scores of 60, 70, 65, 85, and 85 on exams in a sociology class. a. What is the mean of these scores? b. What score would you need on the next exam to have an overall mean of 75? c. If...

Q: Listed below are speeds (in mi/h) of cars

Listed below are speeds (in mi/h) of cars on the New Jersey Turnpike, where the speed limit is 65 mi/h. All cars are going in the same direction, and all of the cars are from New Jersey. The speeds we...

Q: Listed below are amounts (in millions of dollars) collected from

Listed below are amounts (in millions of dollars) collected from parking meters by Brinks and others in New York City during similar time periods. A larger data set was used to convict five Brinks emp...

Q: An educational researcher conducted a census to determine the average (mean

An educational researcher conducted a census to determine the average (mean) number of years it takes undergraduate statistics students to earn a college degree.

Q: Listed below are randomly selected contributions (in dollars) made to

Listed below are randomly selected contributions (in dollars) made to the two presidential candidates in a recent election. All contributions are from the same ZIP code. (The data are from the Huffing...

Q: Waiting times (in minutes) of customers at the Jefferson Valley

Waiting times (in minutes) of customers at the Jefferson Valley Bank (where all customers enter a single waiting line) and the Bank of Providence (where customers wait in individual lines at three dif...