Question: A large number of observations have a mean of 120 and variance of 100. What proportion of observations is? (a) Below 100 (b) Above 130

A large number of observations have a mean of 120 and variance of 100. What proportion of observations is?

(a) Below 100

(b) Above 130

(c) Between 100 and 130

(d) Between 130 and 140

(e) Between 115 and 135?


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