The following results come from two independent random samples taken of two populations. Sample 1 Sample...
The following results come from two independent random samples taken of two populations.
| Sample 1 | Sample 2 |
|---|---|
|
n1 = 50 |
n2 = 35 |
|
x1 = 13.6 |
x2 = 11.6 |
|
σ1 = 2.4 |
σ2 = 3 |
What is the point estimate of the difference between the two population means? (Use
x1 − x2.)
(b)
Provide a 90% confidence interval for the difference between the two population means. (Use
x1 − x2.
Round your answers to two decimal places.)
(c)
Provide a 95% confidence interval for the difference between the two population means. (Use
x1 − x2.
Round your answers to two decimal places.)
Homework Answers
The statistical software output for this problem is :
(a)
Point estimate = 2
(b)
A 90% confidence interval is : (1.00 , 3.00)
(c)
A 95% confidence interval is : (0.80 , 3.20)
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