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Psy335_interpreting_stastics_worksheet1

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PSY 335 Interpreting Statistics WorksheetTesting of 20 randomly selected subjects yielded two sets of scores: Verbal IQ and Reading Comprehension. The table below displays the results and descriptive statistics, as well as frequency distribution charts for each variable and a scatterplot of the correlations between the two variables: Subject Verbal IQ Rdg. Comp. 1 90 88 2 99 97 3 101 110 4 115 121 5 97 98 6 98 95 7 92 89 8 104 109 9 103 100 10 117 100 11 100 96 12 98 101 13 96 105 14 105 105 15 78 80 16 121 99 17 82 75 18 85 89 19 81 78 20 82 86 MEAN 97 96 MEDIAN 98 97 MODE 98 89 STD.DEV. 11.8 11.2 RANGE 43 46 CORREL VERB x RDG 0.79 Please answer the following questions within the appropriate column in the table below: I. Using the provided data and graphs, describe the frequency distribution for the IQ test: a) What is a typical score for this sample? b) How variable are the scores? c) How are the scores distributed? II. Using the provided data and graphs, describe the frequency distribution of the reading test scores: a) What is a typical score for this sample? b) How variable are the scores? c) How are the scores distributed? III. Consider the correlation data given the provided data and graph: a) How are IQ and reading achievement related? IV. Evaluate the data from a psychological testing perspective: a) Are these samples good representations of the general population? How do you know? b) What could you do to make them a more representative sample? c) How would you interpret the correlation results? d) What are some ways this knowledge of their relationship could be used?