A health insurance broker records the monthly extended health and dental insurance premiums for 18 non-smoking white-collar clients between the ages of 31 and 40 (measured in $):
68 150 92 131 64 154 69 111 97
106 154 127 66 129 91 142 47 86
T-Distribution Table
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a. Calculate the sample mean and standard deviation.
x̄ =
Round to the nearest cent
s=
Round to the nearest cent
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b. Construct a 95% confidence interval for the mean monthly insurance premium for all non-smoking white-collar clients between the ages of 31 and 40.
< μ <
Round to the nearest cent