Question

1. Why do you think the sample sizes are not the same for all 5 tests?

Factors	Professions	M (SD)	SEM	t	df	value
F1: physician-nurse collaboration	Physicians Nurses	26.79 (3.14) 28.00 (2.74)	0.319 0.159	3.641	394	<0.001
F2: doctor’s authority	Physicians Nurses	4.51 (1.51) 6.67 (1.38)	0.150 0.078	13.294	412	<0.001
F3: shared education	Physicians Nurses	8.63 (1.78) 9.97 (1.34)	0.179 0.076	6.868	135	<0.001
F4: nursing role in patient care	Physicians Nurses	5.36 (1.38) 6.34 (1.29)	0.138 0.073	6.489	408	<0.001
Overall attitude	Physicians Nurses	45.28 (5.30) 51.12 (4.55)	0.547 0.265	10.391	387	<0.001

Answer 1

I think that the sample sizes are not the same for all 5 tests because the degree of freedom for each of the five tests are different, which means that the sample sizes must be different for each of the five tests.

degree of freedom for these tests is given df = (n1+n2) - 2

n1 denote sample size from first sample and n2 denote sample size from second sample.

So, difference between the degree of freedoms is the main reason due to which I think that the sample sizes are not the same for all 5 tests.