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a. all Hypothesis Tests must include all four steps, clearly labeled; b. all Confidence Intervals must...

a. all Hypothesis Tests must include all four steps, clearly labeled;

b. all Confidence Intervals must include all output as well as the CI itself

c. include which calculator function you used for each problem.

1. Suppose the mean income of 35-year-olds in the United States is $25,000. A random sample of 150 35-year-olds in California results in a sample mean income of $26,600 and a sample standard deviation of $3800. At the 1% significance level, can we conclude that the true mean income of 35-year-old Californians is greater than that of the nation, in general?

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