Probability and Statistics for Engineering and the Sciences (with Student Suite Online)

• Notes
• PresidentHackerCaribou10582
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Stat 321 – Day 2 Numerical Summaries (Ch. 1)

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Reminders Reading assignments in syllabus Bring calculator to class Get out, turn on… Lab 1 Include graphs/output Remember labels and legends! Work together!
Questions? Course Logistics? Blackboard?? Minitab? Ch. 1?

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Last Time – Quantitative Data Graphical summaries Histograms, stem-and-leaf plots, dotplots Describe shape, center, spread, unusual observations (extreme, unique numerical values) Typical value… how closely do the values cluster around this typical value… Numerical summaries
Numerical Summaries Center Mean = Σ x i / n Median = middle value or average middle pair

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Demo 1: Rower weights Def: A measure is resistant if its value is not strongly affected by the presence of outliers in the data set. Mean? Median? The University of North Carolina took a survey of the

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• Winter '08
• Chance

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