Assignment:
Q1. Response in a True or false, and explain:
(a) The p-value of a test equals its observed significance level.
(b) The alternative hypothesis is another way of explaining the results; it says the difference is due to chance.
Q2. Five hundred draws are made at random with replacement from a box of numbered tickets; 276 are positive. Someone tells you that 50% of the tickets in the box show positive numbers. Do you believe it? Answer yes or no, and explain.
A researcher assessed the role of routine walking in physical fitness. In this experiment n=60 pair of subjects were matched for age, gender and weight. However, one member of each pair typically walked to work, whereas the other typically drove. Subjects were given a physical fitness test. Their fitness scores are reported . The higher the fitness score, the better.
The file contains two variables:
- fitness score in group 1 (walkers)
- fitness score in group 2 (drivers)
What should be the researcher conclusion? Write a brief report of paragraph commenting on the conclusion.
walkers |
drivers |
8 |
9 |
17 |
14 |
18 |
10 |
10 |
11 |
15 |
13 |
13 |
9 |
16 |
10 |
15 |
8 |
13 |
7 |
11 |
10 |
12 |
15 |
16 |
10 |
12 |
9 |
8 |
9 |
17 |
14 |
17 |
10 |
13 |
11 |
15 |
10 |
17 |
9 |
14 |
12 |
12 |
8 |
10 |
11 |
15 |
10 |
12 |
16 |
9 |
10 |
16 |
5 |
8 |
11 |
19 |
14 |
17 |
14 |
12 |
11 |
15 |
14 |
16 |
9 |
14 |
7 |
17 |
8 |
10 |
8 |
15 |
10 |
12 |
13 |
17 |
10 |
12 |
14 |
11 |
9 |
17 |
13 |
18 |
10 |
10 |
10 |
16 |
12 |
13 |
11 |
14 |
10 |
13 |
8 |
10 |
5 |
11 |
10 |
13 |
14 |
17 |
9 |
12 |
10 |
8 |
9 |
16 |
14 |
17 |
11 |
10 |
10 |
15 |
12 |
13 |
15 |
14 |
10 |
12 |
9 |