You may need to use the appropriate appendix table or technology to answer this question. The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 n1 = 60 n2 = 35 x1 = 13.6 x2 = 11.6 σ1 = 2.2 σ2 = 3 (a) 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.) to (c) Provide a 95% confidence interval for the difference between the two population means. (Use x1 − x2. Round your answers to two decimal places.) to

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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You may need to use the appropriate appendix table or technology to answer this question.
The following results come from two independent random samples taken of two populations.
Sample 1 Sample 2
n1 = 60
n2 = 35
x1 = 13.6
x2 = 11.6
σ1 = 2.2
σ2 = 3
(a)
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.)
to
(c)
Provide a 95% confidence interval for the difference between the two population means. (Use
x1 − x2.
Round your answers to two decimal places.)
to
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