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What's on the worksheet
- Each part gives summary statistics for a data set with explanatory variable x and response y.
- Isabel weighed and measured 34 pumpkins at a farm stand (made-up data).
- Diego's sailing school logged 29 practice runs on one lake (made-up data).
- Mei's class tested water from a lake on 24 summer mornings (made-up data).
- Arjun prices paperbacks at a used-book shop.
- Priya's school gives a five-minute mental arithmetic quiz in September and again in October (made-up data).
- Leah's report on a data set lists the correlation r = 0.6, the slope of the least-squares line of y on x as 1.2, and the slope of the least-squares…
Teach it first
The free lesson teaches it with worked examples and practice problems.
Slope from r and the spreads, and regression to the mean: 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