Question
The following results are for independent random samples taken from two populations. Sample 1 Sample 2...
The following results are for independent random samples taken from two populations.
| Sample 1 | Sample 2 |
|---|---|
|
n1 = 40 |
n2 = 50 |
|
x1 = 32.2 |
x2 = 30.1 |
|
s1 = 2.6 |
s2 = 4.3 |
(a) What is the point estimate of the difference between the two population means?
(b) What is the degrees of freedom for the t distribution?
(c) At 95% confidence, what is the margin of error?
(d) What is the 95% confidence interval for the difference between the two population means?
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