1 / 9

Understanding Data Types and Frequency Distribution in Quantitative Analysis

This chapter provides an overview of quantitative and qualitative data. It emphasizes how quantitative data can be measured using numbers and figures, while qualitative data gathers information about concepts and ideas. Key topics include the definition of population and variable, the concept of frequency, and various graphing options such as histograms and stem-leaf plots. Examples illustrate how to analyze student grades and age data using frequency distribution, highlighting essential statistical measures like mean, median, and mode to enhance data analysis skills.

cedric-adams
Télécharger la présentation

Understanding Data Types and Frequency Distribution in Quantitative Analysis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related