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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).

https://brainmass.com/statistics/confidence-interval/calculating-confidence-interval-estimate-true-mean-229884

#### Solution Preview

Solution:

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.

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