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In an increasingly data-driven world, it is more important than ever for students as well as professionals to better understand basic statistical concepts. 100 Questions (and Answers) About Statistics addresses the essential questions that students ask about statistics in a concise and accessible way. It is perfect for instructors, students, and practitioners as a supplement to more comprehensive materials, or as a desk reference with quick answers to the most frequently asked questions.
What Are Frequency Distribution and Cumulative Frequency Distribution, and How Do I Create Them?
What Are Frequency Distribution and Cumulative Frequency Distribution, and How Do I Create Them?
Afrequency distribution is a summary of raw data that indicates how often each data point occurs. It is a method for organizing a set of raw data into class intervals, which can then be used to create a histogram. A histogram is a visual representation of a frequency distribution.
Here are 25 scores followed by the steps necessary to create a frequency distribution.
20 | 24 | 11 | 10 | 2 |
1 | 15 | 23 | 13 | 11 |
1 | 4 | 20 | 13 | 1 |
4 | 13 | 23 | 17 | 14 |
1 | 3 | 5 | 4 | 3 |
- Select a class interval or a range of scores into which each data point can be placed. Try to have 5–10 class intervals. In this example, we’ll use a class interval of five values so the intervals are 0–4, 5–9, 10–14, 15–19, and 20–24.
- Now, using a two-column table, count ...
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