Salary information regarding male and female employees of a large company is shown below.
Male
Female
Sample Size64
36
Sample Mean Salary (in $1000)45
41
Population Variance (
)128
72
?
The standard error of the difference between the two sample means is
A. 4.
B. 7.46.
C. 4.24.
D. 2.0.
Answer: D
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