Question 916146
 <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
Ho  mean <= 20 (claim)
Ha  mean > 20
1	10	-10	
2	15	-5	
3	20	0	
4	17	-3	
5	11	-9	
6	25	5	*
7	30	10	*
8	27	7	*
9	36	16	*
10	40	20	*
11	5	-15	
12	26	6	*
 0.05 level of significance (one-tailed)
the decision rule is to reject Ho if the smaller of the number of positive or negative signs < 2
6 neg, 6 pos
We do not reject Ho because 6 > 2
n	a = .01	a = .02	a = .05	a = .10
3				0
4				0
5			0	0
6		0	0	1
7		0	1	1
8	0	0	1	1
9	0	1	1	2
10	0	1	1	2
11	0	1	2	3
12	1	2	2	3