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Warm- up

Warm- up. Use the weight lifter warmup - Printed. Computer Regression. Section 3.3D. Computer Software. There are two statistical software packages that are often used Minitab JMP Once you understand the statistical ideas, you can read and work with almost any software output.

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Warm- up

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  1. Warm- up • Use the weight lifter warmup - Printed

  2. Computer Regression Section 3.3D

  3. Computer Software • There are two statistical software packages that are often used • Minitab • JMP • Once you understand the statistical ideas, you can read and work with almost any software output.

  4. Example: Body Weight & Backpack

  5. Example: Body Weight & Backpack

  6. Example: Age and Gesell Scores

  7. Example: Used Hondas (miles vs price)

  8. Limitations for Correlation & Regression • The distinction between explanatory and response variables is important in regression. • Not important in correlation • Correlation and regression lines describe only linear relationships. • Always plot your data & check the residual plot • Correlation and LSRL are not resistant • They are affected by outliers (unusual points)

  9. Explore: Set A Set B Set C

  10. Unusual Points • Outliers • Observation that lies outside the overall pattern of the other observations. • They are usually in the y-direction • Influential Point • It is influential if removing it would markedly change the result of the calculation. • They are usually in the x-direction

  11. Association does not imply causation!

  12. Homework • Worksheet

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