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Review Questions #5. The below question are based on the following data set. A researcher tested ten young and ten old subjects on both a memory test (MT) and a vocabulary test (VT). In both cases the Higher the score the better the performance. Young Old MT VT MT VT 101 19 115
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Review Questions #5 • The below question are based on the following data set. A researcher tested ten young and • ten old subjects on both a memory test (MT) and a vocabulary test (VT). In both cases the • Higher the score the better the performance. • Young Old • MT VT MT VT • 101 19 115 • 95 20 120 • 20 96 16 111 • 100 17 115 • 115 14 105 • 90 12 99 • 93 15 102 • 104 11 96 • 90 13 98 • 21 108 18 110
A researcher hypothesized that the young would better on both the memory • and the vocabulary tests. Is there evidence to support her hypotheses? • 2. Is there a relation between memory and vocabulary performance? • 3. What VT score would you predict for a subject with a MT score of 9? • What restrictions would you place on the prediction? • 4. Should the same regression line be used to predict the vocabulary scores from • the memory scores for both the young and the old? • 5. Is the strength of the relation between MT and VT different for young and old? • 6. Illustrate how you might convert question #2 into a Chi-Squared question. • How do the answers differ and why?
