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Do Now

Do Now. Who are the individuals being described by the table? What variables describe them, and are they quantitative or categorical?. Patterns and Deviations. Unit 1: Univariate Data. Objectives. Identify overall patterns and deviations in dotplots and stemplots. Overall Pattern.

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Do Now

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  1. Do Now Who are the individuals being described by the table? What variables describe them, and are they quantitative or categorical?

  2. Patterns and Deviations Unit 1: Univariate Data

  3. Objectives • Identify overall patterns and deviations in dotplots and stemplots.

  4. Overall Pattern • Shape: Symmetric or skewed • Center: The midpoint of the distribution • Spread: The smallest and largest values, ignoring outliers.

  5. Deviations • Outlier: an individual observation that falls outside the overall pattern of the graph

  6. Displaying Quantitative Data: DotplotsAre you driving a gas guzzler?

  7. Overall Pattern and Deviations • Overall Pattern • Shape: The shape of the distribution is skewed with most cars having higher mpg and only a few cars having lower mpg. • Center: The center of the distribution is around 28-29 mpg. • Spread: Excluding outliers, mpg ranged from 22 to 33. • Outliers • Solution: We see two cars with unusually low gas mileage, Bentley Arnage and Rolls-Royce Phantom (14 and 18 mpg).

  8. Overall Patterns: Stemplots The stemplot displays electric bills in dollars for a sample of 33 PECO users. Describe the overall pattern and any deviations. How would this information help you make a decision about whether or not to purchase electricity through PECO? Shape: Symmetric Center: Around $60 Spread: Excluding outliers, the bills range from $35 to $96. Outliers: There is one bill that was only $16!

  9. Did we accomplish our objective?

  10. Independent Practice and Homework • Khan Academy: HSS.ID.A.1 • HSS.ID.A.2 • HSS.ID.A.3

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