Asked by john
In a set of 400 values, the mean is 121 and the standard deviation is 14. Estimate how many values fall in betweeb each interval
Answers
Answered by
PsyDAG
What are the size of the intervals?
Z = (score-mean)/SD
Use score values at each end of the intervals.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.
Z = (score-mean)/SD
Use score values at each end of the intervals.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.
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