A researcher wanted to know if there was a difference in customer serviceknowledge before employees completed a Positive Customer Service Enhancement training seminar, and after the seminar.The researcher had each employee complete the Customer Service Knowledge Scale Survey before attending the two week seminar, and then two weeks after completing the seminar.

Before seminar scores: 70, 65, 67, 69, 59, 78, 49, 68, 73, 72, 59, 74

After seminar scores: 78, 69, 78, 69, 69, 77, 65, 73, 74, 77, 77, 77, 77

which one of the following statement is true?

a.) The researcher selected a paired samples t-test, and determined there was a difference in customer service knowledge before (M = 66.92) and after (M =73.58) completing the seminar, (t [11] = 3.79, p < .01).

b.)

The researcher selectedan independentsamples t-test, and determined there was a difference in customer service knowledge before (M = 66.92) and after (M =73.58) completing the seminar, (t [22] = 2.52, p < .05).

c.)

The researcher selected a paired samples t-test, and determined there was not a difference in customer service knowledge before (M = 66.92) and after (M =73.58) completing the seminar, (t [11] = 3.79, p> .05).

d.) The researcher selected a Spearman's rs and determined there was a relationship between survey responses, (r_s[13] = .65, p < .05).