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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Chapter 18
The Chi-Square Probability Distribution
In This Chapter
◆ Performing a goodness-of-fit test with the chi-square distribution
◆ Performing a test of independence with the chi-square distribution
◆ Using contingency tables to display frequency distributions
In the last three chapters, we explored the wonderful world of hypothesis testing as we compared means and proportions of one and two populations, making an educated conclusion about our initial claims. With that technique under our belt, we are now ready for bigger and better things.
 
In this chapter, we will compare two or more proportions using a new probability distribution: the chi-square. With this new test, we can confirm whether a set of data follows a ...

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