Asked by nichole
The mean of a set of normally distributed data is 550 and the standard deviation is 35.
What percent of the data is between 515 and 585?
What percent of the data is between 515 and 585?
Answers
Answered by
MathMate
Normalize 515 and 585, namely
z(515)=(515-550)/35=-1
z(585)=(585-550)/35=1
The percent is the difference of probabilities of one-tail z-values between -1 and +1. It should be a little less than 70%.
z(515)=(515-550)/35=-1
z(585)=(585-550)/35=1
The percent is the difference of probabilities of one-tail z-values between -1 and +1. It should be a little less than 70%.
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