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wallyboy wallyboy
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3 weeks ago
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.

A dotplot depicts the results of the internet usage per week for 300 random customers. The horizontal axis is labeled, Hours of Internet use per week and ranges from 0 to 42 in increments of 6. The dots are plotted as follows: 30 dots above 0; 40 dots above 1; 36 dots above 2; 23 dots above 3, and 4; 11 dots above 5; 18 dots above 6; 14 dots above 7; 9 dots above 8; 19 dots above 9; 7 dots above 10; 9 dots above 11; 8 dots above 12; 2 dots above 13; 8 dot above 14; 2 dots above 15; 3 dot above 16, and 17; 7 dots above 18; 1 dot above 19; 3 dots above 20; 5 dots above 21; 2 dots above 22; 3 dot above 23, and 24; 1 dot above 25, 26, and 28; 2 dots above 30; 1 dot above 31; 2 dots above 32; 1 dot above 43; and 2 dots above 44. There are no dots above 36, and 42. All values are approximate.  


If we want a margin of error of 0.5 hours, how large of a sample would we need?

▸ 960 people

▸ 944 people

▸ 953 people

▸ 952 people
Textbook 
Statistics: Unlocking the Power of Data

Statistics: Unlocking the Power of Data


Edition: 3rd
Authors:
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chevy87chevy87
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3 weeks ago
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wallyboy Author
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3 weeks ago
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Just got PERFECT on my quiz
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