Confidence Interval Formula 2 Sample T Test. The significance level is equal to 1 confidence level. So a significance level of 0 05 is equal to a 95 confidence level.
That means t n 1 2 05. The sample size n is 30. Our best estimate of the difference the point estimate is 9 3 units.
Alpha required argument this is the significance level used to compute the confidence level.
The significance level is equal to 1 confidence level. The sample standard deviation s is 0 4. Here s what the output looks like for the spider and prey example with the confidence interval circled in red. 1 confidence level 100.
