Normal Distributions

Statistics
Tutor: None Selected Time limit: 1 Day

What are the mean and standard deviation of the standard normal distribution? (b) What would be the mean and standard deviation of a distribution created by multiplying the standard normal distribution by 8 and then adding 75?

Mar 25th, 2015

X = 8Z+75

mean of z is 0, thus mean of x is 75, and standard deviation is 8 times stand deviation of Z, which is 8*1 = 8. 

Mar 25th, 2015

What proportion of a normal distribution is within one standard deviation of the mean? (b) What proportion is more than 2.0 standard deviation from the mean? (c) What proportion is between 1.25 and 2.1 standard deviations above the mean?

Mar 25th, 2015

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Mar 25th, 2015
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