assume the true average number of 12-oz coke bottles each person drinks in a day

Question

assume the true average number of 12-oz coke bottles each person drinks in a day is 4 given a sample with 20 people you find the sample standard deviation is 1.4543. what is the probability of finding a person who drinks more than 5 bottles of coke per day
assume the true average number of 12-oz coke bottles each person drinks in a day is 4 given a sample with 20 people you find the sample standard deviation is 1.4543. what is the probability of finding a person who drinks more than 5 bottles of coke per day

Explanation / Answer

here probabilty of that =P(X><5) =1-P(X<5) =1-P(t<(5-4)/1.4543)=1=P(t<0.6876)=1-0.75 =0.25

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