Confidence interval for the difference between the means of the two populations
Salary information for a random sample of male and female employees of a large company is shown below.
|
|
Male
|
Female
|
|
Sample Size
|
64
|
36
|
|
Sample Mean Salary (in $1,000)
|
44
|
41
|
|
Sample Variance
|
128
|
72
|
A) The point estimate of the difference between the means of the two populations is
B) The standard error for the difference between the two means is
C) The 95% confidence interval for the difference between the means of the two populations is
a. 0 to 6.92
b. -2 to 2
c. -1.96 to 1.96
d. -0.92 to 6.92