Question

· The mean of a group of 100 observations
was found to be 20. Later it was found
that four observations were incorrect.
which were recorded as 21, 21, 18 and
20. What is the mean if the incorrect
observations are omitted?
(a) 18
(b) 20
(c) 21
(d) 22​

Answer 1

Answer:

c) 20

Step-by-step explanation:

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