Question

You recently took a statistics exam in a large class. The instructor tells the class that the scores were Normally distributed, with a mean of 72 (out of 100) and a standard deviation of 12 . The median for the exam is:

A. 84 .

B. 60 .

C. 72 .

D. 50 .

Answer 1

From the given information

X=scores on statistics exam

X is normally distributed with mean=72

And standard deviation = 12

We know the for normal distribution

Mean = Median = mode

Hence the median score of the exam is 72

Mean = Median = Mode

Is the standard property of normal distribution.