collect marks of 10 of your classmates in different subjects in the recent examination. estimate the arithmetic mean of marks in each subject and verify them by actual calculations.how many of your estimations represent exact mean?

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To estimate the arithmetic mean of marks in each subject, you would need to collect the marks of 10 of your classmates in different subjects in the recent examination. Let's assume the marks for each subject are as follows:

Subject A: 75, 85, 90, 80, 95, 70, 65, 90, 85, 80
Subject B: 70, 80, 75, 85, 90, 85, 80, 95, 70, 65
Subject C: 80, 75, 70, 85, 90, 85, 80, 95, 70, 65

To estimate the arithmetic mean of each subject, you need to sum up the marks obtained by all students in that subject and divide it by the total number of students. Let's calculate the estimations:

Estimated Mean for Subject A = (75 + 85 + 90 + 80 + 95 + 70 + 65 + 90 + 85 + 80) / 10
Estimated Mean for Subject B = (70 + 80 + 75 + 85 + 90 + 85 + 80 + 95 + 70 + 65) / 10
Estimated Mean for Subject C = (80 + 75 + 70 + 85 + 90 + 85 + 80 + 95 + 70 + 65) / 10

Now, let's calculate the actual arithmetic mean using the same marks:

Actual Mean for Subject A = (75 + 85 + 90 + 80 + 95 + 70 + 65 + 90 + 85 + 80) / 10
Actual Mean for Subject B = (70 + 80 + 75 + 85 + 90 + 85 + 80 + 95 + 70 + 65) / 10
Actual Mean for Subject C = (80 + 75 + 70 + 85 + 90 + 85 + 80 + 95 + 70 + 65) / 10

By comparing the estimated means with the actual means for each subject, you can determine how many estimations represent the exact mean.

For example, if the estimated mean matches the actual mean exactly, then that would be considered an exact representation. If there is a slight difference between the estimated mean and the actual mean, it would not be considered exact.

Verify the estimated means with the actual calculations to determine how many estimates represent the exact mean.

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