Exhibit 10-1 Salary information regarding male and female employees of a large c

Question

Exhibit 10-1

Salary information regarding 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

Population Variance

128

72

Refer to Exhibit 10-1. The point estimate of the difference between the means of the two populations is

a.

-28

b.

3

c.

4

d.

-4

ANS: B                    PTS:   1                    TOP:   Inference - Means    

Refer to Exhibit 10-1. The standard error for the difference between the two means is

a.

4

b.

7.46

c.

4.24

d.

2.0

Male

Female

Sample Size

64

36

Sample Mean Salary (in $1,000)

44

41

Population Variance

128

72

Explanation / Answer

point estimate is 44 - 41 = 3

and SE is 2

x1(bar) 44.00 x2(bar) 41.00 s1 11.31 s2 8.49 n1 64 n2 36 SE = sqrt[ (s12/n1) + (s22/n2) ] (s12/n1) 2.0000 (s22/n2) 2.0000 SE 2.0000

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