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Week7 - claim Ho Ha siglevel m<=230 m<=230(claim m>230 0.05...

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claim m <= 230 n= 52 < = 30 large sample use z dis x-bar= 232 Ho m<= 230 (claim) s= 10 Ha m>230 sig level 0.05 large sample z dist 95 0.05 rejection region 1.65 critical Zc Reject Ho if z> 1.645 large z=  (x-bar- m)/alpha/sqrt n 1.44 (232-230)/(10/SQRT(52)) fail to reject There is not enough evidence to reject the company’s claim that there is at most 230mg of sodium example from week 7 ppt claim  m=  8 n= 58 xbar 7.8 Ho m=8 s 0.5 Ha m not= 8 sig level 0.05 large sample n=58 two tail test 0.03 0.03 -1.96 1.96 reject our Ho if Z <-1.96 or  Z>-1.96 Z= (Xbar-m)/(alpha/sqrtn) -3.05 (7.8-8)/(0.5/SQRT(58))
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it's in the reject area, reject Ho There is enough eveidence to reject the claim that the average of phone calls is 8 min at alpha=0. example from ppt Hypothesis testing with P value a manufacturer claims that its rechargable batteries are good for an average of more than 1,000 c claim = 1000 n= 100 Ho<= 1000 xbar= 1002 Ha> 1000 s= 14 Alpha=0.01 large sample z dist 0.99 0.01 2.33 Reject Ho if z > 2.33 z=
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