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Calculating Confidence Interval Estimate for True Mean

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A snack food manufacturer selected a sample of 15 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 10.0 and the sample standard deviation is 0.15, find the 95% confidence interval estimate for the true mean weight of bags of this type of pretzel.

A.(9.92, 12.34)
B.(8.54, 11.46)
C.(10.42, 10.58)
D.(9.92, 10.08).

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Solution Preview


sample size=n=15
sample mean=10
sample std deviation=0.15
We assume that population is normal or approximately normal
Sample size is less than 30 and population standard ...

Solution Summary

This solution describes the steps for determining confidence interval estimate for true mean weight of bags.