AISL - Topic 4 - Chi-squared tests for independence and goodness of fit

AISL - Topic 4 - Chi-squared tests for independence and goodness of fit How different is different enough? This lesson is a free sample. Read it, with practice that checks your answers: https://ksmaths.com/topic-4/chi-squared/ Every idea from Year 7 to the Diploma, on one map: https://ksmaths.com/map Chapters 0:00 The question 0:20 Warm-up 1:21 Introduction 1:36 The key idea 2:00 Expected frequencies 2:26 The statistic and the decision 3:02 Goodness of fit 4:11 Comparing two means: the t-test 5:39 A second example, finished by you 7:08 Calculator tip 7:55 Where the marks go 8:21 Something to think about The full course is on ksmaths.com: the IB Diploma plan opens every Diploma lesson, AA and AI, SL and HL, plus every lesson from Year 7 for the refreshers. $99 for 12 months or $149 for 2 years, one payment, nothing renews. KS Maths is independent and is not affiliated with or endorsed by the International Baccalaureate (IB).