Excellence

Year 13 Inference

Other factors

Workbook

Pages 2 - 6

Measures of centre & spread

Measures of centre:

Measures of Spread:

Workbook

Pages 7 - 14

confidence intervals

confidence intervals & sample size

Thanks to Prof. Chris Wild, University of Auckland for the animation.

Notice that as the sample size increases, there is less variation in the sample medians.

Workbook

Pages 15 - 16

confidence intervals

Notice that the most of the confidence intervals contain the population mean (green) about 95% of the time.

Workbook

Page 17

Conclusion

Inference

Practice Assessment

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