The manager of a savings and loan branch wants to estimate the average amount held in passbook savings accounts by the branch bank depositors. A random sample of 25 depositors is selected, and the results indicate a sample average of $4,750 and a sample standard deviation of $1,200. Given the 95% confidence interval estimates calculated above, if an individual had $4,000 ina passbook savings account, is this considered unusual?
a. Yes
b. Maybe
c. Do not know
d. No
Answers: 3
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