One Sample T Test Confidence Interval Formula. Round your answer to two decimal places. So a significance level of 0 05 is equal to a 95 confidence level.
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So a significance level of 0 05 is equal to a 95 confidence level. The sample size n is 30. The sample standard deviation s is 0 4.
Your desired confidence level is usually one minus the alpha a value you used in your statistical test.
Because the sample size is small we must now use the confidence interval formula that involves t rather than z. Round your answer to two decimal places. Where a and b are the limits of the confidence interval is the sample mean is the value from the t table corresponding to half of the desired alpha level at n 1 degrees of freedom s is the sample standard deviation and n is the size of the sample. So a significance level of 0 05 is equal to a 95 confidence level.
