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Graphing and Data Analysis. EDN 322. Statistical Investigation. Pose a question Collect data to answer the question Display the collected data Analyze and communicate the results. Questions yield two types of data:. Categorical Numerical. Back. Data Collection Methods. Surveys
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Graphing and Data Analysis EDN 322
Statistical Investigation • Pose a question • Collect data to answer the question • Display the collected data • Analyze and communicatethe results
Questions yield two types of data: • Categorical • Numerical Back
Data Collection Methods • Surveys • Experiments • Simulations • Sampling Back
Picture Graph Favorite Breakfast Foods = 2 students
The Stem and Leaf Plot Data 62 72 36 78 76 72 59 15 90 61 74 52 64 73 76 72 63 60 79 76 63 76 76 84 60 71 70 54 65 74 87 60 81 1 5 2 3 6 4 5 249 6 000123345 7 012223446666689 8 147 9 0
Ways to Describe the Data • Range Three kinds of averages (Measures of Central Tendency): • Mode • Median • Mean
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