Chapter 10
Problem 1.The following results come from two independent random samples taken of two populations.
a. What is the point estimate of the difference between the two population means?
b. Provide a 90% confidence interval for the difference between the two population means.
c. Provide a 95% confidence interval for the difference between the two population means.
Problem 2. Consider the following hypothesis test.
H0: μ1- μ2 <= 0
Ha: μ1- μ2 > 0
The following results are for two independent samples taken from the two populations.
a. What is the value of the test statistic?
b. With α = .05, what is your hypothesis testing conclusion?
Problem 3. The following results are for independent random samples taken from two populations.
a. What is the point estimate of the difference between the two population means?
b. What is the degrees of freedom for the t distribution? ** this will never be asked on an exam, it will be given. (here it is 48, take it as 40)
c. What is the 95% confidence interval for the difference between the two population means?
Problem 4. Consider the following hypothesis test.
H0: μ1- μ2 = 0
Ha: μ1- μ2 != 0
The following results are from independent samples taken from two populations.
a. What is the value of the test statistic?
b. What is the degrees of freedom for the t distribution? ** this will never be asked on an exam, it will be given. (here it is 73, take it as 60)
c. At α = .05, what is your conclusion?
https://www.medcalc.org/calc/comparison_of_means.php