Essay

Based on the provided research example, state the sample size, mean score, and standard deviation for both the treatment and control groups. Additionally, state the value of Cohen's dd and identify which class of statistics (like a tt-test) is still required to complete a formal research report.

Question: Based on the provided research example, state the sample size, mean score, and standard deviation for both the treatment and control groups. Additionally, state the value of Cohen's dd and identify which class of statistics (like a tt-test) is still required to complete a formal research report.

Sample answer: In the study, the treatment group has a sample size of n=50n = 50, a mean score of 34.3234.32, and a standard deviation of 10.4510.45. The control group also has a sample size of n=50n = 50, a mean score of 21.4521.45, and a standard deviation of 9.229.22. The resulting Cohen's dd is 1.311.31. Lastly, inferential statistics (like a tt-test) are still required to complete a formal research report.

Key points:

  • Treatment group: n=50n = 50, Mean = 34.3234.32, SD = 10.4510.45
  • Control group: n=50n = 50, Mean = 21.4521.45, SD = 9.229.22
  • Cohen's dd value of 1.311.31
  • Requirement of inferential statistics/tt-test for formal research reports

Rubric: Grading Criteria: 1. Mentions treatment group details: n=50n = 50, mean of 34.3234.32, and SDSD of 10.4510.45 (2 points). 2. Mentions control group details: n=50n = 50, mean of 21.4521.45, and SDSD of 9.229.22 (2 points). 3. Identifies Cohen's dd as 1.311.31 (2 points). 4. States that inferential statistics (like a tt-test) are required for a formal report (2 points).

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Updated 2026-05-27

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KPU

Research Methods in Psychology - 4th American Edition @ KPU

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