Chapter 11: Q.25 (page 655)
A marathon runner is interested in the relationship between the brand of shoes runners wear and their run times. Sh
The given statement is a test of independence.
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chi-square test statistic = ________
Is the traveler disputing the claim about the average or about the variance?
Suppose an airline claims that its flights are consistently on time with an average delay of at most minutes. It claims that the average delay is so consistent that the variance is no more than minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next flights. The average delay for those flights is minutes with a standard deviation of minutes.
If an additional test were done on the claim of the average delay, which distribution would you use?
Use the following information to answer the next nine exercise: The following data are real. the cumulative number of AIDS cases reported for Santa Clary Country is broken down by ethnicity as in table 11.29
The percentage of each ethnic group in Santa Clary Country is as in Table shown below
:------
What is the test statistic?
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