Economics: Profits per Employee A random sample of companies in electric utilities (I), financial services

(II), and food processing (III) gave the following information regarding annual profits per employee

(units in thousands of dollars). (See reference in Problem 11.)

I II III 49.1 55.6 39.0 43.4 25.0 37.3 32.9 41.3 10.8 27.8 29.9 32.5 38.3 39.5 15.8 36.1 42.6 20.2 Shall we reject or not reject the claim that there is no difference in population mean annual profits per employee in each of the three types of companies? Use a 1% level of significance.

AppendixLO1