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 90 55 sample mean $15.75 $15.50 sample standard deviation $1.00 $0.95 find a point estimate for the difference between the two population means isSelect one:a.20.b..50.c..25.d.1.00.
