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Results tagged with t-distribution
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user 34675
t is the distribution of the t-statistic that results from a t-test. Use this tag only for questions about the distribution; use [t-test] for questions about the test.
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What is the formula for a normal-theory confidence interval of the mean?
Let's start saying you can use this tool to check whether you answer is correct or not.
You should get a confidence interval of $\pm 1.13$.
That said, the correct formula to use is:
$$\bar x \pm z …
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