Chapter 11: Q.12 (page 654)
A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27

The actual distribution for a class of 20 is in table 11.28

Determine P value.
Short Answer
P value is
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Chapter 11: Q.12 (page 654)
A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27

The actual distribution for a class of 20 is in table 11.28

Determine P value.
P value is
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What is the p-value?
Perform a goodness-of-fit test to determine whether the local results follow the distribution of U.S. AP examinee population, based on ethnicity.
Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes. It claims that the average delay is so consistent that the variance is no more than 150 minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25 flights. The average delay for those 25 flights is 22 minutes with a standard deviation of 15 minutes.
How did you know to test the variance instead of the mean?
The table provides a recent survey of the youngest online entrepreneurs whose net worth is estimated at one million dollars or more. Their ages range from to . Each cell in the table illustrates the number of entrepreneurs who correspond to the specific age group and their net worth. Are the ages and net worth independent? Perform a test of independence at the significance level.
You want to buy a specific computer. A sales representative of the manufacturer claims that retail stores sell this computer at an average price of with a very narrow standard deviation of . You find a website that has a price comparison for the same computer at a series of stores as follows: . Can you argue that pricing has a larger standard deviation than claimed by the manufacturer? Use the significance level. As a potential buyer, what would be the practical conclusion from your analysis?
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