Chapter 13 Quiz.docx - Chapter 13 Quiz 1 How do you...

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Chapter 13 Quiz 1. How do you distinguish among the infinitely many different chi-square distributions and their corresponding χ 2-curves? 2. Regarding a χ 2-curve, a. at what point on the horizontal axis does the curve begin? b. what shape does it have? c. As the number of degrees of freedom increases, a χ 2-curve begins to look like another type of curve. What type of curve is that? 3. Recall that the number of degrees of freedom for the t -distribution used in a one-mean t -test depends on the sample size. Is that true for the chi-square distribution used in a chisquare a. goodness-of-fit test? b. independence test? c. homogeneity test? Explain your answers. 4. Explain why a chi-square goodness-of-fit test, a chi-square independence test, or a chi-square homogeneity test is always right tailed. 5. If the observed and expected frequencies for a chi-square goodness-of-fit test, a chi-square independence test, or a chisquare homogeneity test matched perfectly, what would be the value of the test statistic?
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