An educational researcher conducted a study comparing student performance on a physics exam after being taught either through a computer software program or traditional lecture method. 125 students were randomly assigned to the computer instruction and 175 to traditional. After 6 months, all 300 students took an exam. The researcher provided contrived pass rate data showing computer students passed at a higher rate. The researcher formulated a hypothesis to test if computer instruction increased pass rates compared to traditional, and selected an appropriate nonparametric test to analyze the data and determine if the null hypothesis could be rejected.

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)