Homework Answers
Sol:
Null hypothesis:Ho:mu=13560
Alternative Hypothesis,Ha:Mu<13560
Type of statsitc:Z
z=xbar-mu/sigma/sqrt(n)
=(13428-13560)/(2280/sqrt(100))
z= -0.5789474
z=-0.579
p value in excel
=NORM.S.DIST( -0.5789474,TRUE)
=0.281312333
P Value=0.281
p>0.05
Fial to reject Ho
Accept Ho
NO
ANSWER:
Null hypothesis:Ho:mu=13560
Alternative Hypothesis,Ha:Mu<13560
Type of statsitc:Z
z=-0.579
P Value=0.281
NO
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