As shown in the previous question, the average number of siblings (sibs) is about 3.5, with a standard deviation of about 2.8. 1. If we randomly select 1000 American adults, what's the chance that their average number of siblings is lower than 3.2?
As shown in the previous question, the average number of siblings (sibs) is about 3.5, with a standard deviation of about 2.8. 1. If we randomly select 1000 American adults, what's the chance that their average number of siblings is lower than 3.2?
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 2SE: What is a sample space?
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Question
4.1
Transcribed Image Text:subjective class| respondents sexĮ
identification|
male female |
Total
lower class |
124 |
60.78 | 100.00
9.89 ||
5.46 ||
80
204
39.22
7.87
8.99
|
3.52
8.99
575 ||
57.79 | 100.00
45.85 |
25.33 |
working class |
420
995
42.21
41.34
43.83
18.50
43.83
middle class |
|
| 46.75
|
475
514 |
989
51.97 | 100.00
40.99 |
22.64 |
48.03
43.57
20.93
43.57
41 |
upper class |
| 50.00
41
82
50.00 | 100.00
3.27||
1.81 |
4.04
3.61
1.81
3.61
Total |
1,254 | 2,270
55.24 | 100.00
100.00 | 100.00
55.24 | 100.00
1,016
44.76
| 100.00
44.76
Transcribed Image Text:As shown in the previous question, the average number of siblings (sibs) is about 3.5, with a standard
deviation of about 2.8.
1. If we randomly select 1000 American adults, what's the chance that their average number of siblings
is lower than 3.2?
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