Question 18

You draw a random sample of 626 Fort Hays State students and measure their Grade Point Average.The mean GPA of the sample is 3.0, with a standard deviation of .5.What would be the 99% confidence interval for the GPA of the population of all Fort Hays State students.

a.2.95 to 3.05

b.2.81 to 3.18

c.2.74 to 3.26

d.2.45 to 3.55

Question 19

A random sample of 226 houses in Hays were appraised.The mean value of the sample of houses was $83,510, with a standard deviation of $26,625.What would be standard error of the mean for this sampling distribution of means?

a.$1,350

b.$1,500

c.$1,775

d. $1,900

question 20

A random sample of 226 houses in Hays were appraised.The mean value of the sample of houses was $83,510, with a standard deviation of $26,625.What would be the 95% confidence interval for the mean value of all houses in Hays?

a.$82,900 to $84,730

b.$81,790 to $85,920

c.$80,031 to $86,989

d.$79,550 to 87,470

Question 21

A random sample of 226 houses in Hays were appraised.The mean value of the sample of houses was $83,510, with a standard deviation of $26,625.What would be the 99% confidence interval for the mean value of all houses in Hays?

a.$ $77,005 to $86,115

b.$78,655 to $86,665

c.$79,305 to $87,015

d.$78,948 to $88,072