1. 1.FryBrothersheatingandAirConditioning,Inc.employsLarryClarkandGeorgeMurnentomakeservicecallstorepairfurnacesandairconditioningunitsinhomes.TomFry,theowner,wouldliketoknowwhetherthereisadifferenceinthemeannumberofservicecallstheymakeperday.AssumethepopulationstandarddeviationforLarryClarkis1.05callsperdayand1.23callsperdayforGeorgeMurnen.Arandomsampleof40dayslastyearshowedthatLarryClarkmadeanaverageof4.77callsperday.Forasampleof50daysGeorgeMurnenmadeanaverageof5.02callsperday.

Atthe.05significancelevel,isthereadifferenceinthemeannumberofcallsperdaybetweenthetwoemployees?Whatisthep-value?

Hypothesis Test: Independent Groups (t-test, pooled variance)
	Larry	George
	4.77	5.02	mean
	1.05	1.23	std. dev.
	40	50	n
		88	df
		-0.25000	difference (Larry - George)
		1.33102	pooled variance
		1.15370	pooled std. dev.
		0.24474	standard error of difference
		0	hypothesized difference
		-1.02	t
		.3098	p-value (two-tailed)
		-0.73636	confidence interval 95.% lower
		0.23636	confidence interval 95.% upper
		0.48636	margin of error