Question

An army psychologist gave a random sample of seven soldiers a test to measure sense of humor and another test to measure aggressiveness. Higher scores mean greater sense of humor or more aggressiveness.

Soldier	1	2	3	4	5	6	7
Score on humor test	61	49	74	78	46	79	77
Score on aggressiveness test	50	47	63	77	59	49	70

Using a 0.05 level of significance, test the claim that rank in humor has a monotone-decreasing relation to rank in aggressiveness.

(a) Ranking the data with rank 1 for highest score on a test, make a table of ranks to be used in a Spearman rank correlation test.

Soldier	Humor Rank x	Aggressiveness Rank y	d = x - y	d2
1 2 3 4 5 6 7				Σd2 =

(c) Compute the sample test statistic. (Use 3 decimal places.)

Answer 1