A random sample of ZU students has been selected and the time spent on moderate physical activities (MPA) per day for each student is recorded. A public health researcher wants to test whether the mean daily time spent on MPA by ZU students is at least 30 minutes. The appropriate null and alternative hypotheses are OHo: H = 30 vs Hau#30 O Ho: H< 30 vs Ha p2 30 O Ho: u2 30 vs Ha H<30 O Ho: HS 30 vs Ha> 30

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