Chi | Chi-square test p-value
Thislessonexplainshowtoconductachi-squaregoodnessoffittest.Thetestisappliedwhenyouhaveonecategoricalvariable[1]fromasinglepopulation.Itisusedtodeterminewhethersampledataareconsistentwithahypothesizeddistribution.Forexample,supposeacompanyprintedbaseballcards.Itclaimedthat30%ofitscardswererookies;60%wereveteransbutnotAll-Stars;and10%wereveteranAll-Stars.Wecouldgatherarandomsampleofbaseballcardsanduseachi-squaregoodnessoffittesttoseewhetheroursampledistributiondifferedsignificantlyfromthedistr...
This lesson explains how to conduct a chi-square goodness of fit test. The test is applied when you have one categorical variable[1] from a single population. It is used to determine whether sample data are consistent with a hypothesized distribution.
For example, suppose a company printed baseball cards. It claimed that 30% of its cards were rookies; 60% were veterans but not All-Stars; and 10% were veteran All-Stars. We could gather a random sample of baseball cards and use a chi-square goodness of fit test to see whether our sample distribution differed significantly from the distribution claimed by the company. The sample problem[2] at the end of the lesson considers this example.
When to Use the Chi-Square Goodness of Fit TestThe chi-square goodness of fit test is appropriate when the f...