MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The Cambridge Study in Delinquent Development was under- taken in north London to investigate the links between criminal behavior in young men and the socioeconomic factors of their upbringing. A cohort of 395 boys was followed for about 20 years, starting at the age of 8 or 9. The following table shows the total number of criminal convictions by the boys between the start and end of the study.
|
Number of convictions |
Frequency |
|
0 |
265 |
|
1 |
49 |
|
2 |
21 |
|
3 |
19 |
|
4 |
10 |
|
5 |
10 |
|
6 |
2 |
|
7 |
2 |
|
8 |
4 |
|
9 |
2 |
|
10 |
1 |
|
11 |
4 |
|
12 |
3 |
|
13 |
1 |
|
14 |
2 |
(a)How many variables are presented in this table?
(b) Display the frequency distribution in a graph. Which type of graph is most, appropriate?
(c) Describe the shape of the frequency distribution. Is it skewed or is it symmetric? If skewed, is it positively skewed or negatively skewed? Is it unimodal or bimodal? Are there outliers in the number of convictions?
(d) Calculate the sample mean, sample standard deviation, median, the
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