The content follows the order of the Higher Still Unit specifications. Full explanatory text with worked examples allows an element of self-study. Graded exercises develop the questions beyond minimum competence level. End of chapter review exercises bring together the work of the chapter. Reminder notes in the exercises act as a quick revision aid for students. Calculator and non-calculator questions are included.
Part 1 Control charts: review of confidence intervals; "x"-bar charts; "x"-bar charts when "mu" is unknown; "p"-charts; statistics in action - simulation; summary; review exercise. Part 2 Hypothesis testing: review of hypothesis testing and the "z" test; the sign test; ranks and rank sums; the Mann-Whitney test; goodness of fit; association in a contingency table; statistics in action - the chi-squared distribution; summary; review exercise. Part 3 Student's "t" distribution: a confidence interval for "mu" when "theta-squared" is unknown; a test for "mu" when "theta-squared" is unknown; paired data; statistics in action - collecting and analyzing experimental data; summary; review exercise. Part 4 Linear models: fitting a straight line by least square regression; using residuals to check model assumptions; inference on the slope "beta"; interval estimates; measuring the strength of the regression model; correlation; inference on the correlation coefficient "p"; statistics in action -collecting and modelling bivariate data; summary; review exercise; preparation for unit assessment; preparation for course assessment; appendices.