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The mean and standard deviation of 20 ob...

The mean and standard deviation of 20 observations are found to be 10 and 2. respectively. On rechecking, it was found that an observation 8 was incorrect. Calculate the correct mean and standard deviation in each of the following cases: (i) If wrong item is omitted. (ii) If it is replaced by 12.

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PSEB-STATISTICS-EXERCISE
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  6. Find the mean deviation about the mean for the data given below:- xi 1...

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  7. Find the mean deviation about the median for the data given below:- xi...

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  8. Find the mean deviation about the median for the data given below:-xi ...

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  9. Find the mean and variance for the following data:- 6, 7, 10, 12, 13, ...

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  10. Find the mean and variance for the following data:- First n natural nu...

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  11. Find the mean and variance for the following data:- First 10 multiples...

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  12. The sum and sum of squares corresponding to length x (in cm) and weigh...

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  13. The mean and variance of eight observations are 9 and 9.25, respective...

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  14. The mean and variance of 7 observations are 8 and 16, respectively. If...

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  15. The mean and standard deviation of six observations are 8 and 4, respe...

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  16. Given that bar x is the mean and sigma^2 is the variance of n observat...

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  17. The mean and standard deviation of 20 observations are found to be 10 ...

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  18. The mean and standard deviation of a group of 100 observations were fo...

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