To test whether extracurricular activity is a good predictor of college success,

Question

To test whether extracurricular activity is a good predictor of college success, a college administrator records whether students participated in extracurricular activities during high school and their subsequent college freshman GPA Extracurricular Fr eshma Yes Yes Yes Yes No No No No No No 3.54 3.29 3.89 3.68 3.01 3.84 3.37 2.75 3.89 2.75 ute a point-biserial correlation coefficient. (Round your answer to three decimal places.) correlation coeffi (a) Code the dichotomous variable and then he decision to retain or reject the null hypothesis. Hint: You must first convert r to a t-statistic retain or rej (b) Using a two-tailed test at a 0.05 level of significance, state O Retain the null hypothesis. O Reject the null hypothesis.

Explanation / Answer

(a) Code the dichotomous veriable and then compute a point biserial correlation coefficient.

Ans - 0.38

(b) Using a two tailed test at 0.05 level of significance. State the dicision retain or reject the null hypothesis.

Ans - Retain the null hypothesis

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