The following information was obtained from independent random samples taken of two populations.Assume normally distributed populations with equal variances.
Sample 1
Sample 2
Sample Mean45
42
Sample Variance85
90
Sample Size10
12
?
The 95% confidence interval for the difference between the two population means is (use rounded standard error)
A. -5.344 to 11.344.
B. -5 to 3.
C. -4.86 to 10.86.
D. -2.65 to 8.65.
Answer: A
Business
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