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Section 14.1 Organizing and Visualizing Data

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Objectives 1. Describe the population whose properties are to be analyzed. 2. Organize and present data.

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Key Terms Statistics: an area in mathematics where we are interested in gathering, analyzing, presenting, and making predictions from numerical information. Data (Distribution): a collection of numerical information. Population: entire collection of items that is the focus of the survey. Sample: a subset of the population. Biased: sample does not accurately reflect the population as a whole with regard to data gathered. Selection Bias: how you chose the people to participate in the survey. Leading Question Bias: the way a question is asked in a survey.

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Key Terms Frequency Distribution: A set of data listed with their frequencies. Relative Frequency Distribution: contains the percent of time that each item occurred. Frequency Table: a table that lists items and number of times it occurs Bar Graph: a graph that compares different amounts using bars. Histogram: a special type of bar graph used to graph frequency distribution. Stem-and-Leaf Display: a method of presenting data in a graphical formal, similar to a histogram. It is used to assist in visualizing the shape of a distribution.

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Example 1: Construct frequency table, relative frequency table, & bar graph TB pg. 786/1 # of Hours Frequency Relative Frequency

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Example 2: Construct a bar graph for the data TB pg. 786/3

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Example 3: Draw a bar graph TB pg. 786/5 # of Hours Frequency Relative Frequency

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Example 4: Group and draw histogram TB pg. 786/9 HeightFrequency

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Example 5: TB pg. 787/13

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Example 6: TB pg. 788/15

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Example 7: Comparing Wage Data TB pg. 788/17

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Example 8: Comparing Wage Data TB pg. 788/19

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Example 9: Stem-and-Leaf Plot TB pg. 788/23 AB

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Example 10: Comparing Training Programs TB pg. 789/25

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Section 14.1 Assignment Class work: TB pg. 786/2 – 6 Even, and 26 Even Remember you must write problems and show ALL work to receive credit for the assignment. Due Friday, Dec. 09, 2011.

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