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A scientist is weighing each of 30 fishes. Their mean weight worked out is 30 gm and a standard deviation of 2 gm. Later, it was found 20.that the measuring scale was misaligned and always under reported every fish weight by 2 gm. The correct mean and standard deviation(in gm) of fishes are respectively (a) `28,4` (b) `32,2` (c) `32,4` (d) `28,2`

A

`32, 2`

B

` 32, 4`

C

` 28, 2`

D

` 28,4`

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  13. The variance of alpha,beta and gamma is 9, then variance of 5 alpha, 5...

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  14. 1,2,4,6,8,9 transformed into another series whose mean is 12. Two midd...

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  17. For two data sets, each of size 5, the variances are given to be 4 and...

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