Part B posted in new question QUESTION 2 12 marks a In the i

Part B posted in new question

QUESTION 2 (12 marks) (a) In the investigation of question 1, the table below classifies the vehicles by age group of the driver and number of passengers in the vehicle, separated by driver gender. (i) The p-value for testing if the presence or absence of passengers is independent of driver age group for males is 0.854. From this we can say (circle your response): (1) there is no evidence that having passengers or not depends on driver age group for male drivers (2) there is very strong evidence that having passengers or not is independent of driver age group for male drivers (3) there is a 85.4% chance that having passengers or not is independent of driver age group for males. (ii) Comment on the evidence that having passengers or not depends on age group for female drivers. (iii) In the test of (i) above, the degrees of freedom are given by

Solution

(i) There is strong evidence that having passengers or not is independent on driver age group for male drivers since P - value > 0.05(0.854>0.05)

(ii) There is a evidence that having passengers or not is independent on driver age group for female drivers since P - value > 0.05(0.069>0.05)

(iii) The degrees of freedom = (3-1)*(2-1) = 2*1=2