The following information was obtained from independent random samples taken of two populations. Assume normally distributed populations with equal variances. Sample Mean Sample Variance Sample Size Sample 1 45 85 10 Sample 2 42 2 90 12 The 95% confidence interval for the difference between the two population means is (use rounded standard error) a. 4.86 to 10.86. b.-2.65 to 8.65. c-5 to 3. d.-5.344 to 11.344.
The following information was obtained from independent random samples taken of two populations. Assume normally distributed populations with equal variances. Sample Mean Sample Variance Sample Size Sample 1 45 85 10 Sample 2 42 2 90 12 The 95% confidence interval for the difference between the two population means is (use rounded standard error) a. 4.86 to 10.86. b.-2.65 to 8.65. c-5 to 3. d.-5.344 to 11.344.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:The following information was obtained from independent random samples taken of two populations.
Assume normally distributed populations with equal variances.
Sample Mean
Sample Variance
Sample Size
Sample 1
45
85
10
8 Icon Kry
Sample 2
42
2 90 12
The 95% confidence interval for the difference between the two population means is (use rounded standard error)
a. 4.86 to 10.86.
b.-2.65 to 8.65.
c-5 to 3.
O d.-5.344 to 11.344.
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