Question

Could you tell me what kind of test to use for this data, the MD, DF, SSD, t value, t critical, the standard error of the difference and estimated standard error of the difference? Thank you!

A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for randomly selected subjects are shown in the table below. A lower score indicates less pain. The “before” value is matched to an “after” value and the differences are calculated. The differences have a normal distribution. Are the sensory measurements, on average, lower after hypnotism?

Subject	A	B	C	D	E	F	G	H
Before	6.6	6.5	9.0	10.3	11.3	8.1	6.3	11.6
After	6.8	2.4	7.4	8.5	8.1	6.1	3.4	2.0

Answer 1

Before	After	Difference
6.6	6.8	-0.2
6.5	2.4	4.1
9	7.4	1.6
10.3	8.5	1.8
11.3	8.1	3.2
8.1	6.1	2
6.3	3.4	2.9
11.6	2	9.6
	8.7125	mean Before
	5.5875	mean After
	3.1250	mean difference (Before - After)
	2.9114	std. dev.
	1.0293	std. error
	8	n
	7	df
	2.365	critical t
	3.036	t
	.0095	p-value (one-tailed, upper)