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Unit 13: Centre, spread, position, shape

Centre: mean, median, mode

Read this before the quizzes

Mean, median, mode

Far values and weights

Tables and combined groups

Mean

Median of six

Combining groups

Answers and why: centre

Spread: range and standard deviation

Range and why it is not enough

Standard deviation in five steps

Shift and scale

Range

Standard deviation

Scaling

Answers and why: spread

Position: quartiles, percentiles, z-scores

Quartiles and the interquartile range

z-scores

Reading and comparing boxplots

Interquartile range

z-score

The box

Answers and why: position

Pictures of data

Histograms and frequencies

Scatterplots

The normal curve

Histogram

Normal curve

Scatterplot

Answers and why: pictures of data

Word problems and slips

Choose the right measure

Ten slips to watch for

The formula cards

Your pace for this unit

Your mission this week

Two values

Far value

New mean

Answers and why: word problems and slips

Self-check: can you do it?

Statistics: describe the data. This unit has one move: centre, spread, position, shape.

Quantitative Aptitude Unit 13: Statistics, describe the data

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