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The hemoglobin (g/dl) levels are also determined for a random sample of adult females belonging to the same ethnic group. The results are: 13.8 14.4 13.0 15.3 14.7 14.3 14.1 12.9 14.9 The sample mean and sample variance calculated from this sample are 14.16 and 0.660 respectively. V. Test at 5% level of significance whether the hemoglobin levels in the populations of males and females are equally variable? Test at 5% level of significance, whether there is any difference between the mean hemoglobin levels of males and females, using an appropriate vi. parametric procedure. vii. non-parametric procedure. Specify the assumptions required for each test. [7+7+7+2=23 marks]