A study of road rage asked random samples of 596 men and 523 women about their behavior while driving. Based on their answers, each respondent was assigned a road rage score on a scale of 0 to 20. The respondents were chosen by random digit dialing of telephone numbers.

Are the conditions for two-sample t inference satisfied?

(a) Maybe. The data came from independent random samples, but we need to examine the data to check for Normality.

(b) No. Road rage scores in a range between 0 and 20 can’t be Normal.

(c) No. A paired t test should be used in this case.

(d) Yes. The large sample sizes guarantee that the corresponding population distributions will be Normal.

(e) Yes. We have two independent random samples and large sample sizes, and the 10% condition is met.