IOP2601 ASSIGNMENT 1 SEMESTER 1 & 2 2022

IOP2601 ASSIGNMENT 1 SEMESTER 1 & 2 2022. All variances and standard deviations are positive numbers. If you have obtained a negative answer, you have definitely made a mistake. Refer to the hint on page 77 of the study guide. 16. 3 See the discussion of variables on page 45 of the MO001 and on page 13 of Tredoux and Durrheim (2013). 17. 1 False – the symbol “a” stands for the Y-intercept. 18. 3 The regression equation indicates b = 0,21. See pages 96 and 97 of the study guide. 19. 1 False – in every graph, the horizontal line represents the X-axis while the vertical line represents the Y-axis. 20. 2 As indicated in the regression equation, X is substituted with 10 21. 4 b is the slope of the line. Slope means that a unit change in x, the independent variable will result in a change in y 22. 2 If you look at the formula for variance, it is clear that you do not need to calculate the mean: