a) Typing Speed on a pc. Who types faster, Men or Women? (Test at a = .01.)

	Men	Women
	65 wpm	69 wpm
s	10 wpm	14 wpm
n	50	60

b)

Take-Home Pay. Who earns more: Married or unmarried people? (Test at a = .04)

	Married	Not Married
	$639.6	$658.2
s	$60	$90
n	50	60

c)

Who misses work more often at the ABC Company: Smokers or non-smokers? Test at .05 significance level.

Smokers: Average number of days absent = 14.7; standard deviation = 5.0; n = 44 Non-Smokers: Average number of days absent = 8.3; standard deviation = 4.0; n = 60

with solution. thanks.