# Confidence Intervals & T-tests

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Using the attached Excel file, calculate both a confidence interval for a mean (do not worry about the rounding) and a 1-sample t-test that the mean age is less than 62.

What is found? What is the CI and can we reject or accept the null or alternative hypotheses?

Â© BrainMass Inc. brainmass.com March 5, 2021, 1:37 am ad1c9bdddfhttps://brainmass.com/statistics/confidence-interval/confidence-intervals-t-tests-603285

#### Solution Preview

For the confidence interval for a mean, we first calculate the mean and standard deviation. I do this in ...

#### Solution Summary

The solution gives detailed steps on building the confidence interval and performing a one-sample t test for the given data using excel.

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