You may need to use the appropriate appendix table or technologyto answer this question.
The following results come from two independent random samplestaken of two populations.
| Sample 1 | Sample 2 |
|---|
n1 = 50 | n2 = 25 |
x1 = 13.6 | x2 = 11.6 |
?1 = 2.5 | ?2 = 3 |
(a)
What is the point estimate of the difference between the twopopulation means? (Use
x1 ? x2.)
(b)
Provide a 90% confidence interval for the difference between thetwo population means. (Use
x1 ? x2.
Round your answers to two decimal places.)
to
(c)
Provide a 95% confidence interval for the difference between thetwo population means. (Use
x1 ? x2.
Round your answers to two decimal places.)
to
