The mean and the standard deviation(s.d.) of five observations are 9 and 0, respectively.

Question:

The mean and the standard deviation(s.d.) of five observations are 9 and 0, respectively. If one of the observations is changed such that the mean of the new set of five observations becomes 10, then their s.d. is :

  1. 0

  2. 1

  3. 4

  4. 2


Correct Option: , 4

Solution:

Solution not requierd

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