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 (n) 80 65 Sample mean () $16.75 $16.25 Sample variance (s2) $1.00 $0.90 a. The null hypothesis, Ho, is [Select] > b. The test statistic, t = [Select] (1-2)-Do n1 n2