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 standard error of  -  is

A. 3.0.
B. 4.
C. 8.372.
D. 19.48.


Answer: B

Business

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