Asked by Mary
In an intelligence test administered to 1000 children, the average score was 42 and fasting the standard deviation 24.Assuming normal distribution, find the number of children with scores between 30 and 60
Answers
Answered by
R_scott
30 is .5 s.d. below the mean , and 60 is .75 s.d. above the mean
use a z-score table to find the % of the population in the range
use a z-score table to find the % of the population in the range
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