Question

Five students were tested before and after taking a class to improve their study habits. They were given articles to read which contained a known number of facts in each story. After the story, each student listed as many facts as he/she could recall. The following data was recorded.

Before: 10 12 14 16 12

After: 15 14 17 17 20

1.The obtained value of the appropriate statistic to evaluate Ho is ______?

2. Assume there is a real effect. Using , the size of the effect for the improvement equals ______?

Answer 1

1. The obtained value of the appropriate statistic to evaluate Ho is -3.062.

2. Assume there is a real effect. Using, the size of the effect for the improvement equals 1.37.

Before	After	Difference
10	15	-5
12	14	-2
14	17	-3
16	17	-1
12	20	-8
	12.800	mean Before
	16.600	mean After
	-3.800	mean difference (Before - After)
	2.775	std. dev.
	1.241	std. error
	5	n
	4	df
	-3.062	t
	.0376	p-value (two-tailed)