In Order to Determine Whether or Not There Is a Significant

Multiple Choice

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. $$\begin{array} { l l l } & \text { Company A } & \text { Company B } \\\text { Sample size } & 80 & 60 \\\text { Sample mean } & \$ 16.75 & \$ 16.25 \\\text { Population standard deviation } &\$ 1.00 & \$ .95\end{array}$$ A point estimate for the difference between the two population means is

A) 20.
B) .50.
C) .25.
D) 1.00.