Use the following information for questions:
A pooled two independent samples t-test was conducted to compare the average number of accidents for male drivers to that for female drivers. The t-test statistic was 2.4 and the sample sizes were 32 males and 30 females.
-What is the estimated effect size for this study?
A) 2.4
B) 62
C) 0.04
D) 0.61

Question

Use the following information for questions:
 A pooled two independent samples t-test was conducted to compare the average number of accidents for male drivers to that for female drivers. The t-test statistic was 2.4 and the sample sizes were 32 males and 30 females.
-What is the estimated effect size for this study?
A) 2.4
B) 62
C) 0.04
D) 0.61

Quizplus · Accepted Answer

The estimated effect size for a t-test can be calculated using Cohen's d, which is the difference between two means divided by the pooled standard deviation. The t-test statistic itself does not directly give the effect size, but it can be used in conjunction with sample sizes to estimate Cohen's d. The correct answer is not directly calculable from the information given without the means or standard deviations, but among the options provided, 0.61 is a plausible value for Cohen's d, indicating a moderate effect size, while the other options do not represent typical effect size values.

Use the Following Information for Questions