Question

1) The mean height of women in a country (ages 20-29) is 64.3 inches. A random sample of 75 women in this age group is selected. What is the probability that the mean height for the sample is greater than 65 inches? assume σ = 2.59

The probability that the mean height for the sample is greater than 65 inches is __.

2) Construct the confidence interval for the population mean μ

C=0.95 Xbar = 4.2 σ=0.9 n=44

95% confidence interval for μ would be (__,__)

3) Use the normal distribution of SAT critical reading scores for which the mean is 515 and the standard deviation is 105 Assume the variable x is normally distributed.

a) what percent of the SAT verbal scores are less than 550?

b)You would expect that approximately __ SAT scores would be greater than 525

Answer 1