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. Company A Company B
Sample size 70 55
Sample mean $15.75 $15.25
Sample standard deviation $1.00 $0.95
The p-value is 0.0052. At the 5% level of significance, the null hypothesis:.
a. should be revised.
b. should not be rejected.
c. should be rejected.
d. should not be tested.