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Ogives and timeplots

Ogives and timeplots. Unit 2: Analyzing Univariate Data Text: Chapter 1 Exploring Data AP Stats Theme I: A / B Using ogives to determine percentiles from scores or scores from percentiles; seasonal variation, trends, cycles. Ogives. Ogive is a relative cumulative frequency graph

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Ogives and timeplots

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  1. Ogives and timeplots Unit 2: Analyzing Univariate Data Text: Chapter 1 Exploring Data AP Stats Theme I: A / B Using ogives to determine percentiles from scores or scores from percentiles; seasonal variation, trends, cycles

  2. Ogives • Ogive is a relative cumulative frequency graph • The curve is usually of 'S' shape

  3. Steps to constructing an ogives • Decide on class intervals and make a frequency table, just as in making a histogram. Add three columns to your frequency table: relative frequency, cumulative frequency, and relative cumulative frequency. • Label and scale your axes and title your graph. Label the vertical axis “relative cumulative frequency”. • Plot a point corresponding to the relative cumulative frequency in each class interval at the left endpoint of the next class interval. • Use pages 60-61 example 1.9 in text

  4. Timeplots

  5. Assignment • TPS 1.13, 1.18, 1.25 • AP Exam Free Response (Study Design)

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