SOLUTION: A distribution of measurements is relatively mound-shaped with a mean 50 and standard deviation 10. -What proportion of the measurements will fall between 40 and 60? -What p

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Question 836814: A distribution of measurements is relatively mound-shaped with a mean 50 and standard deviation 10.
-What proportion of the measurements will fall between 40 and 60?
-What proportion of the measurements will fall between 30 and 70?
-If a measurement is chosen at random from this distribution, what is the probability that it will be greater than 60?
Answer by psbhowmick(878) About Me  (Show Source):
You can put this solution on YOUR website!
a) Z_Upper = (60-50)/10 = 1, Z_Lower = (40-50)/10 = -1
Required answer
= p(Z = p(Z<1) - p(Z<-1)
= 0.8413 - 0.1587
= 0.6826 = 68.26%
Cheers!!!