Consider the following results for two independent randomsamples taken from two populations.
Sample 1:
n1 = 40
x?1 = 13.9
?1 = 2.3
Sample 2:
n2 = 30
x?2 = 11.1
?2 = 3.4
What is the point estimate of the difference between the twopopulation means? (to 1 decimal)
Provide a 90% confidence interval for the difference between thetwo population means (to 2 decimals).
Provide a 95% confidence interval for the difference between thetwo population means (to 2 decimals).
