Stat 414 – Day 1 Introductions Review.

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Stat 414 – Day 1 Introductions Review

Multilevel models Multilevel data Modelling Technical and Nontechnical communication Applications Software

Stat 414 Syllabus JMP vs. R vs. other Textbook Handouts Homework (due date) Labs Practice quizzes Office hours Project

Day 1 handout Discuss (a)-(f) with a partner

Statistical Modelling General Linear Model (Data = Model + Error) Simple linear regression Multiple regression t-tests ANOVA ANCOVA MANOVA MANCOVA Factor analysis Discriminant analysis

LINE assumptions for inference (L) The mean value for Y at each level of X falls on the regression line. (I) We’ll need to check the design of the study to determine if the errors (distances from the line) are independent of one another. (N) At each level of X, the values for Y are normally distributed. (E) The spread in the Y’s for each level of X is the same.

Discuss Example 1 with partner Will take some speculation Practice translating the conditions into the particular context, e.g., L: The mean reaction time is linearly related to decibel level of the music. I: Stopping distances are independent. The random selection of drivers should assure independence. N: The stopping distances for a given decibel level of music vary and are normally distributed. E: The variation in stopping distances should be approximately the same for each decibel level of music.

For next time Initial survey (Mon) Readings Install JMP and/or R Overview article Ch. 1 Ch. 2 Install JMP and/or R Start HW 1 Initial course survey (Monday) Will need to remember/figure out some software steps