6. A study was done that compared the FAA IRA exam scores with respect to biological sex (male or female) for a particular year. The researcher acquired exam scores from a random sample of n = 79 males and a random sample of n = 71 females. The null and alternative hypotheses were Ho: H =2, H: >2, and the results of an inde- pendent-samples t test with respect to a = .05 were t(148) = -3.0, M = 90.9, M = 93.1, SEDifference = 0.72, and the Levene test had p = .3045. Based on these results, what can we conclude?

a. There was no significant difference between the groups because t* was negative and H was a right-tailed test.

b. There was no significant difference between the groups because p >

a. c. The standard deviations of each group were statistically equal.

d. The 95% Cl included O within the interval.