Confidence Interval Formula T Test. The significance level is equal to 1 confidence level. We could use the t inv function in exce l to calculate this value.
The confidence interval is 9 2 63. T x y μ x μ y s p 1 n 1 m t n m 2. Then the proof is a bit on the trivial side because we then know that.
So if you use an alpha value of p 0 05 for statistical significance then your confidence level would be 1 0 05 0 95 or 95.
Eight pairs of pigs were used. So a significance level of 0 05 is equal to a 95 confidence level. In this case the sample mean is 4 8. Therefore the absolute t test value of the sample is 3 61 which is less than the critical value 3 69 at 99 5 confidence interval with a degree of freedom of 9.
