Question

3. A sample of 23 Aggie Economics majors was administered a typing test before and after drinking a large cup of coffee. The table below provides the sample standard deviations for scores before the coffee, after the coffee, and differences in scores. How large (in absolute value) must the mean difference in scores be in order to reject the null hypothesis H0:Mean Difference = 0 versus H1: Mean Difference not equal to 0 at the significance level alpha = 5%?

alternative hypothesis!,:P < 25%, with significance leven statistic and state your conclusion A sample of 23 Aggie Economics majors was administered a typing test before and after drinking a large cup of coffee. The table below provides the sample standard deviations 3. for scores before the coffee, after the coffee, and the differences in scores. Sample Standard Deviations Before Coffee After Coffee Difference 9.18 8.51 2.38 lute value) must the mean difference in scores be in order to reject the How large (in abso null hypothesis Ho: Mean Difference significance level 5%? 0 versus H1: Mean Difference # 0 at the

Answer 1

Date suen G-iien am 四. SI -Ditter on ce Bus after Cottee doliai on ia do cgeang and too the Cen olin on to hoje do null hypothous cuion more than the psevious A