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What's on the worksheet
- A coffee roaster weighs ten batches of green beans before and after roasting (made-up data).
- The coffee roaster's printout for her ten batches (made-up data; roast time in minutes, weight lost as a percent of the starting weight) is repeated…
- A grower plants chili peppers in raised beds at different crowding, from 2 to 9 plants per square meter, and records the mean number of peppers per…
- A moving company records ten jobs (made-up data):
- A paddle shop lists ten used kayaks (made-up data) with ages from 1 to 10 years and their resale prices in dollars.
Teach it first
The free lesson teaches it with worked examples and practice problems.
Reading regression output: 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