Are Canadians Getting Fatter? Researchers Interested in This Question Take $\mathrm { H } _ { 0 }$

Multiple Choice

Are Canadians getting fatter? Researchers interested in this question take a random sample of 500 people and record an average weight of 86 kg.Ten years ago,the average weight was 83 kg.

A) $\mathrm { H } _ { 0 }$ : ? = 86 $\mathrm { H } _ { \mathrm { A } }$ : ? < 86
B) $\mathrm { H } _ { 0 }$ : ? = 83 $\mathrm { H } _ { \mathrm { A } }$ : ? > 83
C) $\mathrm { H } _ { 0 }$ : ? = 86 $\mathrm { H } _ { \mathrm { A } }$ : ? > 86
D) $\mathrm { H } _ { 0 }$ : ? = 83 $\mathrm { H } _ { \mathrm { A } }$ : ? < 83
E) $\mathrm { H } _ { 0 }$ : ? = 83 $\mathrm { H } _ { \mathrm { A } }$ : ? ? 83