A doctor is interested in determining whether a film about exercise will change 10 persons' attitudes toward exercise. The results of this questionnaire are shown where SD (before) = 3.17 and SD...

What is the absolute computed t-value?

Extracted text: A doctor is interested in determining whether a film about exercise will change 10 persons' attitudes toward exercise. The results of this questionnaire are shown where SD (before) = 3.17 and SD (after) = 2.63). A higher numerical value shows a more favorable attitude toward exercise. Is there enough evidence to support the claim, at a = 0.05, that there was a change in attitude? Before 12 14 9 11 8 6 8 4 7 After 13 9 8 12 10 8 6 What is the absolute computed t-value? 00