Question

Use a t-distribution and the given matched pair sample results to complete the test of the given hypotheses. Assume the results come from random samples, and if the sample sizes are small, assume the underlying distribution of the differences is relatively normal. Assume that differences are computed using d=x1-x2.
Test H0 : μd=0 vs Ha : μd≠0 using the paired difference sample results x¯d=14.80, sd=11.9, nd=25.

Give the test statistic and the p-value.
Give the conclusion using a 5% significance level.

Answer 1

P value ......................by using Excel =TDIST(ABS(6.22),24,2)

P value < 0.05

Therefore, we reject H0 at