21. The degrees of freedom for a contingency table with 6 rows and 3 columns is
a.
18
b.
15
c.
6
d.
10
22. The degrees of freedom for a contingency table with 10 rows and 11 columns is
a.
100
b.
110
c.
21
d.
90
23. The degrees of freedom for a contingency table with 2 rows and 18 columns is
a.
16
b.
20
c.
18
d.
17
24. The degrees of freedom for a contingency table with 12 rows and 12 columns is
a.
144
b.
121
c.
12
d.
120
25. The degrees of freedom for a contingency table with 6 rows and 3 columns is
a.
18
b.
15
c.
6
d.
10
26. Refer to Exhibit 11-1. The point estimate for the difference between the two population proportions in favor of this product is
a.
52
b.
100
c.
0.44
d.
0.02
27. Refer to Exhibit 11-1. The standard error of 1clip_image001.gif”>1 – 1clip_image001.gif”>2 is
a.
52
b.
0.044
c.
0.0225
d.
100
28. Refer to Exhibit 11-1. At 95% confidence, the margin of error is
a.
0.064
b.
0.044
c.
0.0225
d.
52
29. Refer to Exhibit 11-1. The 95% confidence interval estimate for the difference between the populations favoring the products is
a.
-0.024 to 0.064
b.
0.6 to 0.7
c.
0.024 to 0.7
d.
0.02 to 0.3
30. Refer to Exhibit 11-2 and let pu represent the proportion under and po the proportion over the age of 18. The null hypothesis is
a.
pu – po1clip_image002.gif”> 0
b.
pu – po1clip_image003.gif”> 0
c.
pu – po¹ 0
d.
pu – po = 0