# Question

You have heard that if you leave your money in mutual funds for a longer period of time, you will see a greater return. So you would like to compare the 3-year and 5-year returns of a random sample of mutual funds to see if indeed, your return is expected to be greater if you leave your money in the funds for 5 years.

a) Using the data provided, check the conditions for this test.

b) Write the null and alternative hypotheses for this test.

c) Test the hypothesis and find the P-value if appropriate.

d) Find a 95% confidence interval for the mean difference.

a) Using the data provided, check the conditions for this test.

b) Write the null and alternative hypotheses for this test.

c) Test the hypothesis and find the P-value if appropriate.

d) Find a 95% confidence interval for the mean difference.

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