![](/olcweb/styles/shared/spacer.gif) | ![How to Design and Evaluate Research in Education Book Cover](/sites/dl/free/0072532491/title/fw_sm.gif) How to Design and Evaluate Research in Education, 5/e Jack R. Fraenkel,
San Francisco State University Norman E. Wallen,
San Francisco State University
Descriptive Statistics
Learning ObjectivesStudying this chapter should enable you to:
Explain the difference between a statistic and a parameter. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Differentiate between categorical and quantitative data and give an example of each. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Construct a frequency polygon from data. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain what is meant by the terms "normal distribution" and "normal curve." |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Calculate the mean, median, and mode for a frequency distribution of data. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Calculate the range and standard deviation for a frequency distribution of data. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain what a five number summary is. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain what a boxplot displays. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain how any particular score in a normal distribution can be interpreted in standard deviation units. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain what a "z score" is and tell why it is advantageous to be able to express scores in z score terms. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain how to interpret a normal distribution. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Construct and interpret a scatterplot. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Explain more fully what a correlation coefficient is. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Calculate a Pearson correlation coefficient. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Prepare and interpret a frequency table, a bar graph, and a pie chart. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Prepare and interpret a crossbreak table. |
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