1) What is the probability thatarandomly selected woman is taller than 66 inches? (2 decimals, if it is 25.5%, enter 0.26 or 0.25)

Tip: you can use eitherempirical rulewith your memory to answer this easy question.

2) A random sample of 68women is selected. What is the Sample Standard Error?

4 decimals.

Tip: Standard Error =Standard Deviation /sqrt(n) where n is the sample size.

3) We want to know what is the probability that the mean ofrandom selected 4 North American women is taller than 66?

Tip:

1. We don't need n>= 30. The data distribution was "assumed to be normal" . So n= 1, 2, 3, 4,... any number, the mean Xbar is still normal (should be more normal;

2. Don't forget the standard deviation of the sample mean iscalledstandarderror=2/sqrt(4) (Standard Error/sqrt(n); P(Xbar> 66) = P(Z > (66-)/(/n))

P (Xbar > 66) = ??? 4 decimals.

4) We want to know what is the probability that the mean of random selected 36 North American women is taller than65?

Tip: Now n = 36, standard error is (/n)

P (Xbar > 65) = ??? 4 decimals.