1. You want to see if the number of minutes cell phone usersuse each month has c

Question

1. You want to see if the number of minutes cell phone usersuse each month has changed from its mean of 120 minutes 2 yearsago. You take a ramdom sample of 100 cell phone users and find anaverage of 135 minutes used. A. Ho:=135      Ha:>135 B. Ho:=120     Ha:<120 C. Ho:=120      Ha:#120 D. Ho:=120      Ha:>120 E. Ho:=135     Ha:#135 1. You want to see if the number of minutes cell phone usersuse each month has changed from its mean of 120 minutes 2 yearsago. You take a ramdom sample of 100 cell phone users and find anaverage of 135 minutes used. A. Ho:=135      Ha:>135 B. Ho:=120     Ha:<120 C. Ho:=120      Ha:#120 D. Ho:=120      Ha:>120 E. Ho:=135     Ha:#135

Explanation / Answer

C) We must test this in both ends. So, C is the correctone. H0:=120 Vs Ha:#120

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