Salary information regarding male and female employees of a large company is shown below.    Male Female Sample Size 64 36 Sample Mean Salary (in $1000) 44 41 Population Variance () 128 72 ​ Q2) Please select the best answer. If you are interested in testing whether or not the population average salary of males is significantly greater than that of females, at α = .05, the conclusion is that the population:   a. average salary of males is significantly greater than females.   b. average salary of males is significantly lower than females.   c. salaries of males and females are equal.   d. average salary of males is greater than females cannot be proved.

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Q1)

Salary information regarding male and female employees of a large company is shown below. 

 

Male

Female

Sample Size

64

36

Sample Mean Salary (in $1000)

44

41

Population Variance ()

128

72

Q2) Please select the best answer. If you are interested in testing whether or not the population average salary of males is significantly greater than that of females, at α = .05, the conclusion is that the population:

  a.
average salary of males is significantly greater than females.
  b.
average salary of males is significantly lower than females.
  c.
salaries of males and females are equal.
  d.
average salary of males is greater than females cannot be proved.

Q2)

In order to determine whether or not there is a significant difference between the mean hourly wages paid by two companies (of the same industry), the following data have been accumulated. Please calculate the p-value.

 

Company A

Company B

Sample size

80

60

Sample mean

$16.75

$16.25

Population standard deviation

$1.00

$.95

​The p-value is ____. 

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