The frequency distribution below shows the length of some steel rods measured in millimetres. Length (mm)...

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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) 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)

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A Frequency Distribution Analysis i Mean length of the steels To calculate the mean we need to find the weighted average of the length of the steel rods using the frequency distribution Mean Length Fr... View the full answer