Chapter 11: 40 (page 657)
Graph the situation. Label and scale the horizontal axis. Mark the mean and test statistic. Shade in the region corresponding to the p-value.
Short Answer
The graph:
Chapter 11: 40 (page 657)
Graph the situation. Label and scale the horizontal axis. Mark the mean and test statistic. Shade in the region corresponding to the p-value.
The graph:
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Get started for freeState the null and alternative hypotheses?
A sample standard deviation of minutes is the same as a sample variance of __________ minutes.
What can you conclude at the significance level ?
What is the p-value?
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?
What do you think about this solution?
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