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Instructions
Begin work in a document that you will submit after completing all three parts for Lesson 7. You will compile all three parts into one submission for Part III of this lesson’s assignments. The experimental group received instruction in calculus via the Internet, while the control group received traditional classroom instruction. The data consist of the final examination scores for both groups. Conduct an independent-samples t-test, and then answer the questions that follow.
Table 6
Independent Samples t-test Data
Group
Code
Exam
Experimental
1
30
Control
2
28
Control
2
33
Experimental
1
26
Experimental
1
34
Control
2
34
Experimental
1
37
Control
2
33
Experimental
1
26
Control
2
26
There are three main assumptions needing to be satisfied before using the independent-samples t-test for testing differences between the groups. Use SPSS to generate the output needed to test the assumptions. Please discuss each one and explain whether each assumption has been met using SPSS output as needed to include the Shapiro-Wilk test for normality (used when the sample size is less than 50), histograms, and the Levene’s test. Keep in mind if the population value is unknown, it is permissible to infer from sample values. Regardless of sample size, test whether these assumptions are met.
Please produce an SPSS output for an independent-samples t-test comparing the experimental and control group in the calculus exam score.
What are the null and alternative hypotheses?
What is the mean and standard deviation for the experimental group?
What is the mean and standard deviation for the control group?
What is the t-test statistic?
What is the associated probability?
Report the results in APA format.
What might be concluded from this hypothetical study? (Hint: the decision about the null hypothesis)
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