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In a random sample of five airlines, the round trip fare from Ontario to San Francisco...

In a random sample of five airlines, the round trip fare from Ontario to San Francisco is found to be $211, $241, $277, $299, and $322. Assume that these airfares are normally distributed with a standard deviation of $50 dollars.

a. find the sample mean.

b. construct a 90% confidence interval for the sample mean.

c. construct a 95% confidence interval for the sample mean.

Math   Statistics-And-Probability   
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