Question 1 a) The following data represent the number of years patients survived after being diagnosed with terminal cancer:

Question 1

a) The following data represent the number of years patients survived after being diagnosed with terminal cancer:

0.4, 0.5, 0.6, 0.6, 0.6, 0.8, 0.8, 0.9, 0.9, 0.9,

1.2, 1.2, 1.3, 1.4, 2.1, 2.4, 2.5, 4.0, 4.5, 4.6

(i) Construct a stem-and-leaf display (6 marks)

(ii) Supposedly you are inserting the above stem-and-leaf display in a report to be

submitted to management, write a short comment on the diagram.

Question 2

(a) It is noted that 8% of Kaplan students are left handed. If twenty (20) students are randomly selected, calculate the

i. probability that none of them are left-handed,

ii. probability that at most 2 are left-handed,

iii. mean and standard deviation for the number of left-handed students