1. You have made 10 observations of the price of a good. The results are shown below: 120 156 132 141 127 136 129 144 136 142 a) Find the mean of the observations [3 marks] b) Find the range of the observations [1 mark] c) Find the sample variance and standard deviation [6 marks]2. Over the period of 1 year, a greengrocer sells tomatoes at six (6) different prices (X pence per kilogram). He calculates the average number of kilograms, Y, sold per day at each of six different prices. From these data the following are calculated: Ex = 250 2y = 486 Eyz = 3,284 22:2 = 7300 Ex}! = 12,565 71 = 6 3) Calculate and interpret the Coefcient of Correlation between the prices of tomatoes (pence per kilogram) and the daily average kilogram sold [6 marks]