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Math 1332

Math 1332. Chapter 12.1 Data and Analysis. Quantitative data – can be measured with numbers and figures Qualitative data – is used to gather information about issues or ideas. Carefully read the questions in section 12.1 to be sure you are answering what is asked.

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Math 1332

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  1. Math 1332 Chapter 12.1 Data and Analysis

  2. Quantitative data – can be measured with numbers and figures Qualitative data – is used to gather information about issues or ideas Carefully read the questions in section 12.1 to be sure you are answering what is asked. Population – who is being surveyed Variable – What is changing Frequency – how often something occurs

  3. Graphing options Frequency Distribution Grouped Frequency Distribution

  4. Graphing options 8 6 4 2 Histogram # of blond student 9 10 11 12 13 Student Age • 4 4 5 6 8 • 1 4 5 5 • 1 6 7 9 • 7 1 4 7 Stem-Leaf Plot Break # into two parts Data: 44,46,44,45,48,51 54,55,55,61,66,67,69,71,77,74 “stem” “leaves”

  5. Test Grades: 70,74,85,70,90,85,92,88,75,85,93,92,85,71,76,82,95,82,75,99 Grouped Frequency Distribution Histogram 8 6 4 2 # of Grades 90-100 80-89 70-79 Grade Range 9 0 2 2 3 5 9 8 2 2 5 5 5 5 8 7 0 0 1 4 5 5 6 Stem-Leaf Plot

  6. Math 1332 Chapter 12.2 Mean, Median, Mode, Midrange

  7. 50, 55, 51, 60, 55, 53, 52, 61, 66

  8. Project • 25% of your next test grade • Due on May 3 (or before) • Must be typed

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