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An educational researcher designs a study to compare the effectiveness of teaching Physics by a
computer software program and by the traditional lecture discussion method. The researcher
randomly assigns 125 students from a class of 300 to instruction using the computer. The
remaining 175 students are instructed using the traditional method. At the end of a 6-month
instructional period, all 300 students are given an examination with the results reported below. a.
First supply the observed frequencies in the table below satisfying the marginal column totals.
For this contrived data, choose numbers so that the proportion of those who pass under computer
instruction will be greater than that under traditional instruction. (This instruction is intended for
each of you to have distinct results of your data analysis). (4 points) b. Formulate a null
hypothesis and the corresponding directional alternative hypothesis for the following research
question: "Does instruction using the computer software program appear to increase the
proportion of students passing the examination in comparison to the pass rate using the
traditional method of instruction?' (4 points) c. Using a calculator, choose an appropriate
nonparametric test to test your null hypothesis. Use = .05 . Is your null hypothesis rejected?
Explain your answer. ( 6 points) d. Verify the value of your computed test statistic using Excel,
JASP or SPSS. What is the p-value of the obtained test statistic? (6 points)

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An educational researcher designs a study to compare the effectiveness.docx

  • 1. An educational researcher designs a study to compare the effectiveness of teaching Physics by a computer software program and by the traditional lecture discussion method. The researcher randomly assigns 125 students from a class of 300 to instruction using the computer. The remaining 175 students are instructed using the traditional method. At the end of a 6-month instructional period, all 300 students are given an examination with the results reported below. a. First supply the observed frequencies in the table below satisfying the marginal column totals. For this contrived data, choose numbers so that the proportion of those who pass under computer instruction will be greater than that under traditional instruction. (This instruction is intended for each of you to have distinct results of your data analysis). (4 points) b. Formulate a null hypothesis and the corresponding directional alternative hypothesis for the following research question: "Does instruction using the computer software program appear to increase the proportion of students passing the examination in comparison to the pass rate using the traditional method of instruction?' (4 points) c. Using a calculator, choose an appropriate nonparametric test to test your null hypothesis. Use = .05 . Is your null hypothesis rejected? Explain your answer. ( 6 points) d. Verify the value of your computed test statistic using Excel, JASP or SPSS. What is the p-value of the obtained test statistic? (6 points)