Chapter 12: Q. 12.2 (page 484)
How do you identify different chi-square distributions?
Short Answer
The number of degrees of freedom is used to identify the different chi-square distributions.
Chapter 12: Q. 12.2 (page 484)
How do you identify different chi-square distributions?
The number of degrees of freedom is used to identify the different chi-square distributions.
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Get started for freeA chi-square homogeneity test is to be conducted to decide whether four populations are nonhomogeneous with respect to a variable that has eight possible values. What are the degrees of freedom for the x2-statistic?
In each of Exercises 12.18-12.23, we have provided a distribution and the observed frequencies of the values of a variable from a simple random sample of a population. In each case, use the chi-square goodness-of-fit test to decide, at the specified significance level, whether the distribution of the variable differs from the given distribution.
Distribution: 0.2, 0.4, 0.3, 0.1
Observed frequencies: 85, 215, 130, 70
Significance level = 0.05
The Quinnipiac University Pol conducts nationwide surveys as a public service and for research. This problem is baed on the results of one such poll that asked independent random samples of American adults in urban, suburban, and rural regions, "Do you support or oppose requiring background checks for all gun buyers?" Here are the results.
At the significance level, do the data provide sufficient evidence to conclude that a difference exists in the proportions of supporters among the three regions?
In this exercise, you are to consider two variables, and defined on a hypothetical population. Following are the conditional distributions of the variable corresponding to each value of the variable.
a. Are the variables and associated? Explain your answer.
b. Determine the marginal distribution of.
c. Can you determine the marginal distribution of ? Explain your answer.
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