Question

22. In testing the null hypothesis H₀: μ₁  -   μ ₂ = 0, the computed test statistic is z = -1.66. The corresponding p-value is ​

	a.	​.9515.
	b.	​.0485.
	c.	​.9030.
	d.	​.0970.

15. The level of significance  α

	a.	is (1 - confidence coefficient).
	b.	is always a negative value.
	c.	can be any positive value.
	d.	can be any value between -1.96 to 1.96.

10. The following information was obtained from matched samples.

The daily production rates for a sample of workers before and after a training program are shown below.

Worker	Before	After
1	20	22
2	25	23
3	27	27
4	23	20
5	22	25
6	20	19
7	17	18

The p-value of the test statistic is

	a.	0.5
	b.	0.05
	c.	0.10
	d.	0.01

Answer 1