Solved: What is the margin of error, Basic Statistics

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What is the margin of error

Assignment:

A phone company wishes to estimate the mean battery time for their phone. They choose to sample 36 phones and find that the sample average is 325 minutes. Assume that the data is normally distributed. Also assume that s=30_s=30.

Construct a 90% confidence interval.

What is the appropriate t value for the interval?

What is the margin of error?

What is the lower bound?

What is the upper bound?

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