A survey was conducted to investigate whether there is an association between a person’s age and their thoughts on what a state senate should do about state parks. Participants selected from “leave state parks the way they are,” “increase funding to state parks,” or “completely overhaul state parks,” and their age was categorized as under … Read more
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Which of the following chi-square distributions has the smallest number of degrees of freedom? (graph)
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A chi-square test for homogeneity was conducted to investigate whether the four high schools in a school district have different absentee rates for each of four grade levels. The chi-square test statistic and p-value of the test were 19.02 and 0.025, respectively. Which of the following is the correct interpretation of the p-value in the … Read more
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How are the expected counts calculated when a chi-square goodness-of-fit test is conducted? A) The expected counts are calculated by multiplying each proportion in the null hypothesis by 100. B) The expected counts are calculated by multiplying each proportion in the alternative hypothesis by 100. C) The values observed from the sample are the expected … Read more
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An administrator at a local high school wants to investigate whether there is an association between the grade level of a student (either ninth, tenth, eleventh, or twelfth) and how the student commutes to school (either walks, bikes, takes the bus, receives a ride, or drives). After a chi-square test for association was conducted, the … Read more
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If the animal clinic treats 230 animals in a month, how many of each animal type would be expected? A) 40 B) 42 C) 50 D) 58 E) 60
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Which of the following is true about the chi-square test for homogeneity? A) The number of subjects randomly assigned to each treatment is not the same; therefore, it is not appropriate to use a chi-square test for homogeneity across treatment groups. B) Volunteers do not constitute a random sample from the population of all patients … Read more
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A chi-square test for homogeneity was conducted to investigate whether the four high schools in a school district have different absentee rates for each of four grade levels. The chi-square test statistic and p-value of the test were 19.02 and 0.025, respectively. Which of the following is the correct interpretation of the p-value in the … Read more
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Which of the following is closest to the p-value of the appropriate test to investigate whether the proportion of people living in the northern part of the state who are in favor of removing the cash lane is different from the proportion of people living in the southern part of the state who are in … Read more
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Which of the following is the appropriate test to investigate whether there is an association between opinion about the ballot initiative and highest level of education completed? A) A two-sample t-test for a difference between means B) A two-sample z-test for a difference between proportions C) A chi-square test of homogeneity D) A chi-square test … Read more
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