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Chapter 11: Q.70 (page 658)
Decide whether the following statements are true or false;
The standard deviation of the chi-square distribution is twice the mean.
The statement is false.
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Where is located on a chi-square curve?
Read the statement and decide whether it is true or false.
The test to use to determine if a six-sided die is fair is a goodness-of-fit test.
Is it more likely the in the graph?
Consumers may be interested in whether the cost of a particular calculator varies from store to store. Based on surveying stores, which yielded a sample mean of and a sample standard deviation of , test the claim that the standard deviation is greater than .
Teachers want to know which night each week their students are doing most of their homework. Most teachers think that students do homework equally throughout the week. Suppose a random sample of 56 students were asked on which night of the week they did the most homework. The results were distributed as in Table 11.8.
From the population of students, do the nights for the highest number of students doing the majority of their homework occur with equal frequencies during a week? What type of hypothesis test should you use?
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