Question

1) According to a Canadian Cancer Statistics report, “over one-quarter (27%) of all cancer deaths are attributed to lung cancer.” Suppose that the life-span (in years) after a diagnosis of lung cancer is approximately normally distributed with mean of 4.3 years and standard deviation of 0.7 years. Determine the probability that a person diagnosed with lung cancer lives for:

a) More than five years after diagnosis?

b) Less than three years after diagnosis?

c) Between three and four years after diagnosis?

2)  Considering the situation from question 1, determine the following:

a) The top 20% of such people live for at least how long after diagnosis?

b) The bottom 25% of such people live for at most how long after diagnosis?

Answer 1

TOPIC:Use of the Normal distribution.