The frequency distribution below shows the length of some steel rods measured in millimetres. Length (mm) Number of Steels 20-39 7 40-59 13 6 19 5 A. B. A. B. 60-79 80-99 100-119 Calculate an estimate for the: C. i. mean length of the steels. ii. median length of the steels. iii. modal length of the steels. Determine the: i. variance. ii. standard deviation. Age (x) 72 Number of deaths (y) 3 Question 3 During a health crisis, a health ministry was trying to determine if there was a relationship between the age of patients and the number of deaths from a virus. The following data was gathered from hospitals. Table 2. 64 70 85 53 90 2 3 5 1 6 Table 3. Plot the data on a scatter diagram. Determine the: i. slope. ii. iii. 81 4 y-intercept. equation of the least squares regression line. Compute the Correlation Coefficient (r) and interpret your answer. (4 marks) (5 marks) (5 marks) (4 marks) (2 marks) (Total 20 marks) 45 1 (4 marks) (5 marks) (3 marks) (1 mark) (7 marks)