QUESTION TWO [25] 2.1 For a random sample of 12 married couples, the age difference (male age minus female age) in years is recorded below. For the above data calculate: 3 -4 7 12 2 20 6 For this data calculate the: 2.1.1 mean (3) 2.1.2 range (2) 2.1.3 interquartile range (5) 2.1.4 mean deviation (5) 2.2 The average speed of a car over a certain distance is calculated by dividing the total distance travelled by the total time taken. Two towns A and B are 10 km apart, A motorist travels from A to B at an average speed of 20 km per hour, and travels from B to A at an average 40 km per hour. 2.2.1 Determine the average speed of the motorist for the two trips combined. (i.e from A to B and the back to A) (4) 2.2.2 What speed would the motorist have to average on the return trip from B to A to yield an overall speed of 30km per hour? (Assume the motorist has averaged 20km per hour from A to B) (6) QUESTION THREE [25] In a bid to determine the effectiveness of their succession planning, Elemenopee Lid is interested in determining the age distribution of its employees. In this regard, the company collected ages from each of their employees and summarized it as follows: Age Frequency 0 under 20 4 20 under 30 LO 30 under 40 18