Question: In order to determine whether or not there is a significant difference between the hourly wages of two companies, two independent random samples were selected

In order to determine whether or not there is a significant difference between the hourly wages of two companies, two independent random samples were selected and the following statistics were calculated.

	Company A	Company B
Sample size	90	70
Sample mean	$9.25	$8.25
Population standard deviation	$1.00	$0.85

The value of the test statistic is _____.

a. 1.645

b. 6.83

c. 6.56

d. 2.561

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