Q. 85.0( 1 Vote )

# The mean and stan

To Find: Find the correct mean and standard deviation.

Explanation: Here, n=100,

X =

Now,

Corrected

3990

So, The mean of correct score =

Mean = 39.9

Now, Standard variance = 5.1

Since, Variance =

Variance = 26.01

X =

26.01 =

26.01 =

Corrected -50+40

Corrected

Corrected Variance =

1625.91-1592.01

Corrected variance =34 (Approx)

Now, Corrected Standard Deviation =

Correct Deviation is 5.83

Hence, The correct Mean is 39.9 and Correct SD is 5.83

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