Question

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd = 0. Compute the value of the t test statistic. Round intermediate calculations to four decimal places as needed and final answers to three decimal places as needed.

Subject A B C D E F G H I
Before 168 180 157 132 202 124 190 210 171
After 162 178 145 125 171 126 180 195 163

Answer 1

t = 3.156

Explanation:

N = 9

Please check attachment for the table

ED = 89

ED² = 1587

Bar D = 89/9

= 9.8889

The standard deviation s

= √14283-7921/81

= √78.5432

S = 8.8625

The test statistic

= 9.8889/8.8625/√9-1

= 9.8889/3.1334

= 3.156

From the calculations above, the calculated test statistic t is = 3.156.

Please check the attachment for a more detailed solution to this problem.

Thank you!