Triola Chapter 8 Problem Answers
Note: These answers have been proofread as of
corrections are appreciated. The availability of these answers puts a demand for a very high standard
of detail on student presentation of problem solutions.
|
Section |
Problem |
Solution |
|
8-2 |
24 |
z = ± 2.81 |
|
|
26 |
0.67 |
|
|
40 |
Reject |
|
8-3 |
6 |
z = –2.70, z = –1.645, 0.0035, support, no |
|
|
14 |
Test z = –3.31, crit z = –2.33, support |
|
|
24 |
z = –5.46 (x = 144), crit z = –2.33, P = 0.0001, support less than 27% |
|
8-4 |
14 |
z = – 8.18 crit z = ±1.96, distances not accurately measured |
|
|
18 |
z = –1.12, crit z = ±1.96, P = 0.263, same |
|
8-5 |
14 |
t = –0.382, crit t = –1.725, P = 0.3533 (not in table — how do you find it?) |
|
|
20 |
t = –1.756, crit t = ±2.110, P = 0.0970, not all |
|
|
26 |
t = –0.119, crit t = –1.753, not |
|
8-6 |
12 |
χ2 = 114.586, crit χ2 = 57.153, 106.629, P = 0.0136, worse |
|
|
16 |
χ2 = 3.831, crit χ2 = 8.672, P = 0.0004, supermodels vary less (big surprise!) |