A scientist is weighing each of 30 fishes. Their mean weight worked out is 30 gm and a standard deviaiton of 2 gm. Later, it was found that the measuring scale was misaligned and always under-reported every fish weight by 2gm. The correct mean and standard deviation (in gm) of fishes are respectively:

$32, 2$

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$32, 4$

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$28, 2$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

$28, 4$

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Solution

The correct option is A
$32, 2$

Correct mean = observed mean $+ 2 = 30 + 2 = 32$
Correct S.D.= observed S.D. $= 2$

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