a. Distinguish between Type I and Type II error. (2 marks) b. Explain the methods of random…
a. Distinguish between Type I and Type II error. (2 marks)
b. Explain the methods of random sampling. (6 marks)
c. An economist is studying the job market in Nyeri area neighborhoods. Let x represent the total number of jobs in a given neighborhood and let y represent the number of entry level jobs inthe same neighborhood. A sample of six Nyeri neighborhoods gave the following information (units in 100s of jobs).
|
x |
16 |
33 |
50 |
28 |
50 |
25 |
|
y |
2 |
3 |
6 |
5 |
9 |
3 |
i. Draw a scatter diagram representing the data. (4 marks) ii. Find the equation of the least squares line y?a?bx. (6 marks)
iii. For a neighborhood with x = 40 jobs, how many are predicted to be entry level jobs?
(2 marks)
