Q. 5 A

# The mean and stan

It is given in the question that,

Total number of observations (n) = 20

Also, incorrect mean = 20

And, incorrect standard deviation = 2

Thus, incorrect sum of observations = 200

Hence, correct sum of observations = 200 – 8

= 192

= 10.1

Thus,

= 2080 – 64

= 2016

= 2.02

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