Assume the following for a paired-samples t test: N = 9, M_difference = 101.4, s = 450.2.What is the 90 percent confidence interval for a two-tailed test?

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Quizplus · Accepted Answer

The 90% confidence interval for a two-tailed test in a paired-samples t test can be calculated using the formula: mean difference ± (t-critical value * standard error of the difference). Given N = 9, the degrees of freedom (df) = N - 1 = 8. For a 90% confidence interval and df = 8, the t-critical value (from a t-table) is approximately 1.86. The standard error (SE) is s/√N = 450.2/√9 = 150.07. Therefore, the confidence interval is 101.4 ± (1.86 * 150.07), which calculates to approximately [-177.72, 380.52].

Assume the Following for a Paired-Samples T Test: N =