Question: Previously a study found that statistics students were spending about $400.00 on textbooks per semester. A researcher at Penn State decides to research book cost

Previously a study found that statistics students were spending about $400.00 on textbooks per semester. A researcher at Penn State decides to research book cost because he now believes that book cost per semester is greater than $400.00. A random sample of 64 statistics students finds that the sample mean is $410.00 with a standard deviation of $80. Is this strong evidence that the average amount spent on textbooks per semester is greater than $400? We wish to carry out the appropriate hypothesis test.

Suppose that the p-value for our test had been 0.21 (that was not the p-value, but let's suppose it was).Based on a p-value of 0.21, would a 95% confidence interval for the true population average spent include $400?

Yes

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