4.11: Chapter Solution (Practice + Homework)
- Page ID
- 5559
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1.
| \(x\) | \(P(x)\) |
|---|---|
| 0 | 0.12 |
| 1 | 0.18 |
| 2 | 0.30 |
| 3 | 0.15 |
| 4 | 0.10 |
| 5 | 0.10 |
| 6 | 0.05 |
3.
0.10 + 0.05 = 0.15
5.
1
7.
0.35 + 0.40 + 0.10 = 0.85
9.
1(0.15) + 2(0.35) + 3(0.40) + 4(0.10) = 0.15 + 0.70 + 1.20 + 0.40 = 2.45
11.
| \(x\) | \(P(x)\) |
|---|---|
| 0 | 0.03 |
| 1 | 0.04 |
| 2 | 0.08 |
| 3 | 0.85 |
13.
Let \(X =\) the number of events Javier volunteers for each month.
15.
| \(x\) | \(P(x)\) |
|---|---|
| 0 | 0.05 |
| 1 | 0.05 |
| 2 | 0.10 |
| 3 | 0.20 |
| 4 | 0.25 |
| 5 | 0.35 |
17.
1 – 0.05 = 0.95
18.
\(X =\) the number of business majors in the sample.
19.
2, 3, 4, 5, 6, 7, 8, 9
20.
\(X =\) the number that reply “yes”
22.
0, 1, 2, 3, 4, 5, 6, 7, 8
24.
5.7
26.
0.4151
28.
\(X =\) the number of freshmen selected from the study until one replied "yes" that same-sex couples should have the right to legal marital status.
30.
1,2,…
32.
1.4
35.
0, 1, 2, 3, 4, …
37.
0.0485
39.
0.0214
41.
\(X =\) the number of U.S. teens who die from motor vehicle injuries per day.
43.
0, 1, 2, 3, 4, ...
45.
No
48.