Dr. Mutombo would like to assess the impact of using an online statistics service to help students study for the PSY 215 departmental final exam. A sample of 12 students is obtained. Half (n 6) are given access to the new stats online service while the other half (n = 6) serves as a control group. Each group of students is eventually tested on an exam out of a 100. Below is the data obtained: Answer the following questions. Show your work for full credit and round to the third decimal whenever necessary. Control Group Experimental Group M1=63 M2=88 SS1=1250 SS2=1750 a. State your hypotheses b. Does the data indicate a aignificant difference between the treatments for a two-tailed test at the .05 level of significance? Please specify (1) the t statistic, (2) specify the boundaries of the critical region, (3) state your decision. Show your computations for full credit c. Compute r2 d. Write up your results in a sentence as you would for a research paper; use APA format.

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Dr. Mutombo would like to assess the impact of using an online statistics service to help students study for the PSY 215 departmental final
exam. A sample of 12 students is obtained. Half (n = 6) are given access to the new stats online service while the other half (n = 6) serves as
a control group. Each group of students is eventually tested on an exam out of a 100. Below is the data obtained:
Answer the following questions. Show your work for full credit and round to the third decimal whenever necessary.
Control Group
Experimental Group
M1=63
M2=88
SS1=1250
SS2=1750
a. State your hypotheses
b. Does the data indicate a ɔignificant difference between the treatments for a two-tailed test at the .05 level of significance?
Please specify (1) the t statistic, (2) specify the boundaries of the critical region, (3) state your decision. Show your
computations for full credit
c. Compute r2
d. Write up your results in a sentence as you would for a research paper; use APA format.
Transcribed Image Text:Dr. Mutombo would like to assess the impact of using an online statistics service to help students study for the PSY 215 departmental final exam. A sample of 12 students is obtained. Half (n = 6) are given access to the new stats online service while the other half (n = 6) serves as a control group. Each group of students is eventually tested on an exam out of a 100. Below is the data obtained: Answer the following questions. Show your work for full credit and round to the third decimal whenever necessary. Control Group Experimental Group M1=63 M2=88 SS1=1250 SS2=1750 a. State your hypotheses b. Does the data indicate a ɔignificant difference between the treatments for a two-tailed test at the .05 level of significance? Please specify (1) the t statistic, (2) specify the boundaries of the critical region, (3) state your decision. Show your computations for full credit c. Compute r2 d. Write up your results in a sentence as you would for a research paper; use APA format.
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