A researcher hypothesizes that people of personality type K score higher than people of personality type R on an intelligence test. The S_Difference turned out to be .9, while the mean score of type K people was 18.8 and the mean score for type R people was 21.3. What is the t score? A)t = (18.8-21.3)/ .9² = -3.09 B)t = (18.8-21.3)(.3)= 8.33 C)t = (18.8-21.3)/ .9 = -2.78 D)t = (18.8-21.3)/ [(2)(.9)] = -1.39

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Quizplus · Accepted Answer

The formula for calculating the t score is t = (mean1 - mean2) / (SSdifference / (n1 + n2 - 2)^1/2). Using the given information, we can calculate t as t = (18.8 - 21.3) / (.9 / (2^1/2)) = -2.78. Therefore, the answer is choice C.

A Researcher Hypothesizes That People of Personality Type K Score