Question 3 1 Point In professional cricket one of the generally accepted requirements for a bowler to be considered express is that they have to be able to bowl above 145 km/hr. With this in mind, a contingent of pace bowlers had a bowling competition and measured the speed of their quickest ball. They found that the overall mean was 138.9km/hr with a standard deviation of 8.6 km/hr. Someone then randomly and repeatedly selects 11 bowlers from the group and records the mean of their quickest deliveries. The standard deviation of the distribution of these sample means is then A None of these B 0.78 C 2.59 D 8.6 Question 4 1 Point In professional cricket one of the generally accepted requirements for a bowler to be considered express is that they have to be able to bowl above 145 km/hr. With this in mind, a contingent of pace bowlers had a bowling competition and measured the speed of their quickest ball. They found that the overall mean was 138.9km/hr with a standard deviation of 8.6 km/hr. What is the probability that 11 fast bowlers chosen randomly from this group will have a mean maximum speed less than 145km/hr? A Approx 0.25 (25%) B Approx 0.99 (99%) C Approx 0.75 (75%) D Approx 0.01 (1%)