Turn over 19 Question 8 continued (b) Considering practical aspects of the context, explain why the values found in part (a) may be expected to be the modal values. (2) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ (c) Find the missing residual for collision A. (2) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Therese identifies collision G as a significant outlier. (d) Describe, in context, a situation in which it would be appropriate to discard the data for this collision in any analysis of the data. (1) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Therese decides that it is appropriate to discard the data for collision G. (e) For the new dataset of 14 collisions, find (i) Pearson’s product moment correlation coefficient, r (1) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ (ii) the least squares regression line in the form y = a + bx (2) _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________