Statistic

In JASP, compute descriptive statistics (i.e., sample size, mean, and standard deviation) and construct histograms of the Age variable split by Admit_Status.

[Include screenshots of your descriptive statistics table and histograms here]

Explain why a Welch t test is an appropriate analysis to conduct using these data to address the admissions office’s research question.

Write the null and alternative hypotheses that you will test to address the admissions office’s research question. You may use statistical notation, or you may write out the hypotheses in words.

H0:

H1:

In JASP, conduct a Welch t test to determine if there is evidence that the mean ages of first-year students and transfer students are different in this population. Include the 95% confidence interval for the difference in means and include Cohen’s d as a measure of effect size.

[Include a screenshot of your JASP output here]

Is there evidence that the mean ages of first-year and transfer students are different in this population? Explain how you determined this.

Write a paragraph summarizing the results of your analysis in APA style. Include the following: group-level sample sizes, group-level means, group-level standard deviations, t test statistic, degrees of freedom, p value, 95% confidence interval for the mean difference, and Cohen’s d. Your write-up should explicitly state whether the test was statistically significant.

In JASP, compute descriptive statistics (i.e., sample size, mean, and standard deviation) and construct histograms of the Age variable split by Admit_Status.

[Include screenshots of your descriptive statistics table and histograms here]

Explain why a Welch t test is an appropriate analysis to conduct using these data to address the admissions office’s research question.

Write the null and alternative hypotheses that you will test to address the admissions office’s research question. You may use statistical notation, or you may write out the hypotheses in words.

H0:

H1:

In JASP, conduct a Welch t test to determine if there is evidence that the mean ages of first-year students and transfer students are different in this population. Include the 95% confidence interval for the difference in means and include Cohen’s d as a measure of effect size.

[Include a screenshot of your JASP output here]

Is there evidence that the mean ages of first-year and transfer students are different in this population? Explain how you determined this.

Write a paragraph summarizing the results of your analysis in APA style. Include the following: group-level sample sizes, group-level means, group-level standard deviations, t test statistic, degrees of freedom, p value, 95% confidence interval for the mean difference, and Cohen’s d. Your write-up should explicitly state whether the test was statistically significant.