Question: Using the data in Exercise 1, and assuming that the data come from a distribution that is normally distributed, a) Find a 95% confidence interval

Using the data in Exercise 1, and assuming that the data come from a that is normally distributed,
a) Find a 95% confidence interval for the mean difference in ages of houses in the two neighborhoods.
b) Is 0 within the confidence interval?
c) What does it say about the null hypothesis that the mean difference is 0?

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