8. Find the mean and standard deviation of a normal distribution of marks in an examination where 58% of the candidates obtained marks below 75, 4% got above 80 and the rest between 75 and 80
Added by Shannon R.
Step 1
In this case, 58% of the candidates obtained marks below 75, so the mean is slightly above 75. Second, we know that the standard deviation is a measure of how spread out the numbers in the data set are. In a normal distribution, about 68% of the data falls within Show more…
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