15 p1: For 20 paired pieces of bivariate data (x, y) with a Pearson's product moment e Yet anot correlation coefficient of r = 0.93, a twins ar line of best fit of y on x is calculated scored 9 as y = 0.51x + 7.5. The data represents refused that he students' scores on a maths test, x, and your ar on a physics test, y. The mean of the x data is x = 100. f If, for a a If an x-value of 120 is known, twins, estimate the corresponding y-value, the tes assuming that this is interpolation. unrelia (2 marks) estima b Find the mean of the y-data, y. (2 marks) 17 P2: Paired biv c Describe in two words the type of the table linear correlation that is shown by the heigh metres) this example. (2 marks) on a sma d A teacher knows a y-value and wants to find the corresponding x-value. 2.4 3.6 State which linear regression line 3.0 4.0 should be used to find an estimate a i for the x-value. (1 mark) 16 P2: Ten pairs of twins take an intelligence test. In each pair of twins, one twin ii le The