Find the mean of the following observations: 20, 30, 40 and 50

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Solution

The correct option is A 35

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Similar questions

Q. The mean and variance of 7 observations are 8 and 16, respectively. If 5 of the observations are 2, 4, 10, 12, 14, find the remaining 2 observations.

Or

Calculate the mean deviation about the mean of the following data.

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and

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Calculate the mean and standard deviation. Also interpret the results

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