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4 Tutorials that teach Confidence Intervals Using the T-Distribution
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Confidence Intervals Using the T-Distribution

Confidence Intervals Using the T-Distribution

Author: Ryan Backman
Description:

This lesson will explain finding a confidence interval with the t-distribution.

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Terms to Know
Confidence Interval

An interval we are some percent certain (eg 90%, 95%, or 99%) will contain the population parameter, given the value of our sample statistic.

t-distribution

A family of distributions similar to the standard normal distribution, except that they are fatter in the tails, due to the increased variability associated with using the sample standard deviation instead of the population standard deviation in the formula for the test statistic.

Formulas to Know
Confidence Interval of Population Mean

C I space equals space x with bar on top space plus-or-minus space t asterisk times space bevelled fraction numerator s over denominator square root of n end fraction