Recall that a simple random sample of 36 new mobile homes yielded the prices, in thousands of dollars, shown in Table 8.1 on page 332.We found the mean of those prices to be $63.28 thousand.
a. Use this information and Procedure 8.1 on page 339 to find a 95% confidence interval for the mean price of all new mobile homes. Recall that σ = $7.2 thousand.
b. Compare your 95% confidence interval in part (a) to the one found in Example 8.2(c) on page 334 and explain any discrepancy that you observe.