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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
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?


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