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Answer all the questions [15 marks] 1. Draw a scatter diagram for the following data X 1 4 7 11 14 20 22 y 10 13 18 21 30 33 38 From the scatter diagram determine if there is a linear relationship between the variables x and y. What is the type of relationship? [5] 2. Calculate Pearson's product moment correlation r for the followings set of data. Explain the result obtained. Student A B C D E Written test score 62 60 82 90 82 Oral test score 60 65 70 83 72 [10]