(a) Find the critical value, t*, for a 99% confidence interval. t* = (b) Find the margin of error for a 99% confidence interval. hour(s).

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A random sample of 16 size AA batteries for toys yield a mean of 3.16 hours with standard deviation, 0.93 hours.
(a) Find the critical value, t*, for a 99% confidence interval. t* =
(b) Find the margin of error for a 99% confidence interval.
hour(s).
Note: Round off your answer to 2 decimal places.
Transcribed Image Text:A random sample of 16 size AA batteries for toys yield a mean of 3.16 hours with standard deviation, 0.93 hours. (a) Find the critical value, t*, for a 99% confidence interval. t* = (b) Find the margin of error for a 99% confidence interval. hour(s). Note: Round off your answer to 2 decimal places.
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