Question

The following results are for independent random samples taken from two populations.

Sample 1	Sample 2
n1 = 20	n2 = 30
x1 = 22.8	x2 = 20.1
s1 = 2.3	s2 = 4.8

(a) What is the point estimate of the difference between the two population means? (Use x₁ − x₂.)

(b) What is the degrees of freedom for the t distribution? (Round your answer down to the nearest integer.)

(c) At 95% confidence, what is the margin of error? (Round your answer to one decimal place.)

(d) What is the 95% confidence interval for the difference between the two population means? (Use x₁ − x₂. Round your answers to one decimal place.)

______ to ______

Answer 1

a) 22.8

b) 46

c) (0.654,4.746)

please like ??