Cambridge A Level Mathematics: Probability & Statistics 1 (9709 Paper 5)

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92 lessons

5.1 · Representation of data

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5.1 · Measures of central tendency

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5.1 · Measures of variation

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The range

Preview10m

Quartiles and the interquartile range

Preview12m

Box-and-whisker plots

12m

Outliers

12m

Quartiles and percentiles from a cumulative frequency graph

12m

Variance and standard deviation

13m

Variance using the sum of the squares

12m

Standard deviation of grouped data

13m

Mean and standard deviation from totals

12m

Mean and standard deviation from coded totals

13m

Combining two sets of data

13m

Comparing two sets of data

12m

Measures of variation: practice

12m

Measures of variation: exam practice

15m

Measures of variation: summary

5.3 · Probability

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5.2 · Permutations and combinations

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5.4 · Probability distributions

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5.4 · The binomial and geometric distributions

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5.5 · The normal distribution

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5.1 · Measures of variationLesson 7 of 15

Variance using the sum of the squares

The mean of the squares minus the square of the mean gives the same variance with much less working.

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