A psychologist hypothesizes that the children with type-K personality score higher than the children with type-R personality on an memory test. The estimated standard error turned out to be 0.9, while the mean score of type-K children was 18.8 and the mean score for type-R children was 21.3. What is the t score?
A. t = (18.8-21.3)/0.92 = -3.09
B. t = (18.8-21.3)(0.3) = 8.33
C. t = (18.8-21.3)/0.9 = -2.78
D. t = (18.8-21.3)/(2)(0.9) = -1.39
Answer: C
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Answer the following statement true (T) or false (F)
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