Group I
A researcher investigates whether children exhibit a higher number of aggressive acts after watching a violent television show. The numbers of aggressive acts for the same 10 participants before and after watching the show are as follows:After
Before
5
4
6
6
4
3
4
2
7
4
3
1
2
0
1
0
4
5
3
2
What should the researcher conclude about this relationship?
Group II
In 1980, some researchers reported that “men have more mathematical ability than women” as evidenced by the 1979 SAT’s, where a sample of 30 random male adolescents had a mean score ± standard deviation of 436±77 and 30 random female adolescents scored lower: 416±81 (genders were similar in educational backgrounds, socio-economic status, and age). Do you agree with the authors’ conclusions?Group III
For a portion of the study, pair of doctors were shown the same set of tumor pictures. The volume of the tumor was measured by two separate physicians under similar conditions.Question of interest: Did the measurements from the two physicians significantly differ?
Tumor
Dr. 1
Dr. 2
1
15.8
17.2
2
22.3
20.3
3
14.5
14.2
4
15.7
18.5
5
26.8
28.0
6
24.0
24.8
7
21.8
20.3
8
23.0
25.4
9
29.3
27.5
10
20.5
19.7