0.2) A researcher wants to know if the mean times {in minutes) that people watch their favourite news station are the same. The following table shows the result of a study. TV Channel 1 TV Channel 2 TV Channel 3 45 15 72 12 43 37 18 68 56 38 50 60 23 31 51 35 22 (a) Test at a = 0.05 if the mean times {in minutes) that people watch their favourite news station are the same. (b) Test whether there is difference in the population variances between TV Channel 1 and TV Channel 2 using 5% level of significance. (c) Test whether there is a difference in the mean times (in minutes) that people watch their favourite news station between TV Channel 1 and 2 at 2% level of signicance. (36 Ma rksl