In a random sample of seven tablets, the mean repair cost was $125 with
a standard deviation of $33.40. Construct a 99% confidence interval for the
population mean, the mean cost of tablet repair.
*Hint: Use the Tinterval
($110.76, $140.84)
($33.40, $125)
($64.48, $95.52)
($78.20, $171.80)

Answer :

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