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What's on the worksheet
- A marine biology class surveyed six rock pools at low tide (made-up data):
- Each part describes a set of paired data through its products of z-scores.
- A local history group measures the widest patch of lichen on five gravestones in one churchyard (made-up data).
- A foraging club records, for five autumn walks in one wood (made-up data), the rain in the week before the walk x (mm) and the number of edible…
- A running club has 40 members who finished the same marathon (made-up data).
- A cactus nursery lists four of its potted cacti (made-up data) as pairs (age in years, height in cm):
Teach it first
The free lesson teaches it with worked examples and practice problems.
Correlation from standardized values: the lesson ›More Chapter 2 worksheets: Exploring two-variable data
- 2.1Conditional relative frequencies
- 2.2Association in a two way table and segmented bar graphs
- 2.3Describing a scatter plot
- 2.4The correlation coefficient
- 2.5Interpreting a residual
- 2.6Making and reading residual plots
- 2.7Correlation from standardized values
- 2.8The least squares criterion and its line
- 2.9Slope from r and the spreads, and regression to the mean
- 2.10r squared and the standard deviation of the residuals
- 2.11Reading regression output
- 2.12Outliers, leverage and influential points
- 2.13Transforming to linearity: logs and exponential models
- 2.14Log-log transforms and power models