A stady abou the cafege aptnude of seaiors at North Cay High School has resated

Question

A stady abou the cafege aptnude of seaiors at North Cay High School has resated in a sample men with a conesponding z-score of -2.00. I the criical valwe for the region of rejection is 11m what is the coeTect conclusion? Since dhe e-vase does not fall wihin the region of ngection, we shouls conclode his sample mean IWety represents sonme other populstion. Sace the z-value does not tall wihin the reaion of tejocon, we should tol conclude Dis sample m sepss some other populadion. Since the r-value lals within the o ofcs we should conclude this sample men Skely represests some otheer populstion Sime the abr lalh willin te iegion ot nietkon.ve sould mi codile th, sampk meen miresents uin, enn npuulus

Explanation / Answer

Ans:

As,z score=-2

Critical rejection region:

z<-1.96 or z>1.96

As,z=-2<-1.96,so z falls within the rejection region,so we can conclude that sample mean is likely to represent some other population.

Third option is correct.

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