Q1, A manufacturing company is concerned about men and women doing similar jobs in their plant but paid different salaries. A random sample of 60 male and 50 female workers were taken from the manufacturing company. The workers grouped frequency distribution for the salaries for male and female workers (in RM 000's) was calculated and presented as shown in Table 2.1.

Table 2.1 Cum. Cum. Percentage Percentage Percentage Percentage Lower Upper Frequency Frequency Frequency Frequency Frequency Frequency Limit Limit (Male) (Female) (Male) (Female) (Male) (Female) 20 30 0 2 0.0% 4.0% 0.0% 4.0% 30 40 3 1.0% 6.0% 1.0% 10.0% 40 50 4 13 13.0% 26.0% 14.0% 36.0% 50 60 24 17 36.0% 30.0% 50.0% 66.0% 60 70 21 8 36.0% 16.0% 86.0% 82.0% 70 80 7 3 11.0% 6.0% 97.0% 88.0% 80 90 3 O 3.0% 0.0% 100.0% 88.0% 90 100 O 4 0.0% 12.0% 100.0% 100.0% 60 50 100% 100%Table 2.2 Male Workers' Female Workers' Salaries (n1 = 60) Salaries (n2 = 50) Mean 61.3 Total salary earned 2800 Median 61.43 58.75 Variance 60.54 127.78 Standard deviation Coefficient of Variation (as in %)