Chto Connect Question 7 (ot 8 7· 12.50 points A national grocers magazine report

Question

Chto Connect Question 7 (ot 8 7· 12.50 points A national grocers magazine reports the typical shopper spends 8.5 minutes in line waiting to check out. A sample of 26 shoppers at the local Farmer Jack's showed a mean of 7,6 minutes wth a standard deviation of 31 minutes is the wating time at the local Farmer Jack's less than that reported in the national magazine? Use the 0 100 signficance level a. What is the decision nde? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.) mRejectH085 when the test stastic is to minus sign. Round your answer to 3 decimal places) b.The value ofthe test statiste is) ) (Negative amount should be indicated by a C. What is your decision regaeding oi? O Reject Ho eBook & Resources

Explanation / Answer

a) for 0.10 level and (n-1=25) degree of freedom reject Ho if test staitstic t <=-1.316

b)

std error of mean =std deviaiton/(n)1/2 =3.1/(26)1/2 =0.608

hence test statistic t=(X-mean)/std error =(7.6-8.5)/0.608 =-1.480

c)

as test statistic is less than critical vlaue ; reject HO

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