3. On Canvas, you will find the file steel. csv. This con- tains information of hourly wages of steel factory workers in four different areas. The company believes that the wages are different between the 4 areas. (a) State the appropriate null and alternative hypothe- sis. (b) Calculate the test-statistic and p-value using R, using the large sample x approximation. (c) State your conclusion in terms of the problem. (d) Using R, calculate the standard deviations of each group. Does an assumption of parametric ANOVA appear to be violated? Explain