Use the following to answer the questions below:
An Internet provider contacts a random sample of 300 customers and asks how many hours per week the customers use the Internet. The responses are summarized in the provided dotplot. The average amount of time spent on the Internet per week was 7.2 hours, with a standard deviation of 7.9 hours.
‪
-If we want a margin of error of 0.5 hours, how large of a sample would we need?
A) 960 people
B) 953 people
C) 952 people
D) 944 people

Question

Use the following to answer the questions below:
An Internet provider contacts a random sample of 300 customers and asks how many hours per week the customers use the Internet. The responses are summarized in the provided dotplot. The average amount of time spent on the Internet per week was 7.2 hours, with a standard deviation of 7.9 hours.
‪ 
-If we want a margin of error of 0.5 hours, how large of a sample would we need?
A) 960 people 
B) 953 people 
C) 952 people 
D) 944 people

Quizplus · Accepted Answer

n = 11eeb2d3_8e0b_b77b_b9aa_67ce0c537ba7_TBW1049_11 = 959.02
We would need 960 people.

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