ahnorthcutt4965
09.09.2021 •
Social Studies
Good life with examples
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Ответ:
Number of members chosen by Helena in her homeroom = 5
Mean number of tickets = 16
So, total candidates who had purchased ticket = 16 × 5= 80
Now, number of candidates chosen randomly = 10
So, total candidates who had purchased ticket = 22.5 × 10=225
No, one sample can't be a better representation by choosing randomly a group of members.
In Sample 1 , we are considering only 5 drama numbers.
And In Sample 2, we are considering 10 random samples among 75 members.
The mean in two cases varies by (22.5-16=6.5) which is large because we are considering number of tickets sold by members of club.
It would have been better if she has taken more than 3 random samples of 15 students ,among 75 students, then she would have got appropriate mean or value near the mean.