Question

MEDICATION ‘’A’’:			5	7	4	9	5	7	6	6	9	8
MEDICATION ‘’B’’:			3	2	4	5	4	4	3	5	3	4

The SQRT(1/nA + 1/nB) = SQRT ( 1/10 + 1/10) = SQRT (0.2) = __________

The 95% CI is therefore (MA – MB) ± t α/2 * Sp * SQRT(1/nA + 1/nB) = ______ ± _____ = _____<M<_____.

Answer 1

The data is given by:-

	MEDICATION ‘’A’’:	MEDICATION ‘’B’’:
	5	3
	7	2
	4	4
	9	5
	5	4
	7	4
	6	3
	6	5
	9	3
	8	4
Count	10	10
Mean	6.6	3.7
StDev	1.712697677	0.948683298

The SQRT(1/n_A + 1/n_B) = SQRT ( 1/10 + 1/10) = SQRT (0.2) = 0.4472

The critical value for α=0.05 and df=18 degrees of freedom is

We need to compute the pooled standard deviation, as follows:

The standard error is computed as follows:

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