QUESTION ONE A. The following table shows the marks obtained by applicants for a certain job in an aptitude test. 73 37 33 64 37 31 57 37 31 Sorted marks obtained by applicants 49 45 41 36 30 49 36 30 34 29 34 27 39 34 27 38 34 27 38 34 25 (i) Find the mean of the data set (ii) Find the standard deviation of the data set. (iii) Find the percentage of values that fall within two standard deviations around the mean. (iv) Find the percentage of values that fall within three standard deviations around the mean.

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