The following results are for two independent random samples taken from two populations.
Sample 1
Sample 2
n1 = 50
n2 = 35
= 13.6
= 11.6
σ1 = 2.2
σ2 = 3.0
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.