The blood sugar level, in milligrams per deciliter(mg/dl), for 70 patients is shown

below.

Blood Sugar Level (mg/dl)

Number of patients

51 - 60	5
61 - 70	8
71 - 80	7
81 - 90	15
91 - 100	24
101 - 110	11

(i)

Calculate for the mean and standard deviation of the blood sugar level of the

70 patients.

(ii) Calculate the mode of the number of the blood sugar level of the 70 patients.

(iii)

Using the values obtained from (i) and (ii) above, calculate the coefficient of

skewness. Hence, comment on the shape of the distribution.

(iv)

Draw a cumulative frequency polygon on graph paper. Estimate the median

from the graph.