Question

mean of 50 observation are found to be 80.4. but later on it was discovered that 96 was misreaded as 69 at one place. find the correct mean.

Answer 1

Answer: 80.94

Step-by-step explanation:

Mean= Sum of observation/ no. of observation

Therefore in this question,

80.4 = Sum of observation/ 50

Rearranging: sum of observation = 80.4x 50 = 4020

Now we just subtract the mistaken number and add the real number...

4020-69+96= 4047

And divide it again to find the correct mean

Mean = 4047/ no. Of observation

= 4047/ 50

=80.94

Answer 2

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