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A recent survey asked 90 students, How many hours do you spend on the computer in a typical day?Of the 90 respondents, 3 said 1 hour, 5 said 2 hours, 15 said 3 hours, 25 said 4 hours, 20 said 5 hours, 15 said 6 hours, 5 said 7 hours, 1 said 8 hours, and 1 said 9 hours.What is the average (mean) number of hours spent on the computer?0.544.445

Question

A recent survey asked 90 students, How many hours do you spend on the computer in a typical day?Of the 90 respondents, 3 said 1 hour, 5 said 2 hours, 15 said 3 hours, 25 said 4 hours, 20 said 5 hours, 15 said 6 hours, 5 said 7 hours, 1 said 8 hours, and 1 said 9 hours.What is the average (mean) number of hours spent on the computer?0.544.445

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Solution

To find the average (mean) number of hours spent on the computer, we need to calculate the sum of all the hours reported and divide it by the total number of respondents.

Let's calculate the sum of the hours: (3 * 1) + (5 * 2) + (15 * 3) + (25 * 4) + (20 * 5) + (15 * 6) + (5 * 7) + (1 * 8) + (1 * 9) = 3 + 10 + 45 + 100 + 100 + 90 + 35 + 8 + 9 = 400

Now, let's calculate the average by dividing the sum by the total number of respondents: 400 / 90 = 4.44

Therefore, the average (mean) number of hours spent on the computer is approximately 4.44 hours.

This problem has been solved

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