The following results come from two independent random samples taken of two populations.

Sample 1	Sample 2
n1	50	n2	30
x1	13.7	x2	11.5
01	2.2	o2	3.5

a. What is the point estimate of the difference between the two population means? (to 1 decimal) 2.2

b. Provide a confidence interval for the difference between the two population means (to 2 decimals). ( , )

c. Provide a confidence interval for the difference between the two population means (to 2 decimals)