The results for a survey of 120 students who were selected randomly are as follows 60 students have a cell phone plan with compa
ny x. 36 students have a cell phone plan with company y. 24 students do not have a cell phone the total population of students was 380.Based on the data what is the best approximation for the total number of students who have a cell phone plan with company y?
1 answer:
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Solution:
Given the mean and standard deviation;
The z-score formula is;
(a)
(b)
(c)