A scientist is weighing each of 30 fishes.

Question:

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 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 : 

  1. 28, 4 

  2. 32, 2

  3. 2, 4 

  4. 28, 2 


Correct Option: , 2

Solution:

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