CH15 - 15: CHI-SQUARED TESTS MULTIPLE CHOICE QUESTIONS In...

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Unformatted text preview: 15: CHI-SQUARED TESTS MULTIPLE CHOICE QUESTIONS In the following multiple-choice questions, please circle the correct answer. 1. Which statistical technique is appropriate when we describe a single population of qualitative data with exactly two categories? a. z-test of a population proportion b. The chi-squared test of a multinomial experiment c. The chi-squared test of a contingency table d. Both a and b e. Both b and c ANSWER: d 2. If we want to conduct a two-tail test of a population proportion, we can employ: a. z-test of a population proportion b. the chi-squared test of a binomial experiment since 2 2 = z c. the chi-squared test of a contingency table d. Both a and b e. Both b and c ANSWER: d 3. Which statistical technique is appropriate when we wish to analyze the relationship between two qualitative variables with two or more categories? a. The chi-squared test of a multinomial experiment b. The chi-squared test of a contingency table c. The t-test of the difference between two means d. Both a and b e. Both b and c ANSWER: b 4. If we want to conduct a one-tail test of a population proportion, we can employ: a. z-test of a population proportion b. the chi-squared test of a binomial experiment since 2 2 = z c. the chi-squared test of a contingency table d. Both a and b e. Both b and c Chi-Squared Tests ANSWER: a 5. In a goodness-of-fit test, suppose that the value of the test statistic is 13.08 and df = 6. At the 5% significance level, the null hypothesis is a. rejected and p-value for the test is smaller than 0.05 b. not rejected, and p-value for the test is greater than 0.05 c. rejected, and p-value for the test is greater than 0.05 d. not rejected, and p-value for the test is smaller than 0.05 ANSWER: a 6. In a goodness-of-fit test, suppose that a sample showed that the observed frequency i f and expected frequency i e were equal for each cell i . Then, the null hypothesis is a. rejected at = 0.05 but is not rejected at = 0.025 b. not rejected at = 0.05 but is rejected at = 0.025 c. rejected at any level d. not rejected at any level ANSWER: d 7. The president of a state university collected data from students concerning building a new library, and classified the responses into different categories (strongly agree, agree, undecided, disagree, strongly disagree) and according to whether the student was male or female. To determine whether the data provide sufficient evidence to indicate that the responses depend upon gender, the most appropriate test is: a. chi-squared goodness-of-fit test b. chi-squared test of a contingency table (test of independence)...
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CH15 - 15: CHI-SQUARED TESTS MULTIPLE CHOICE QUESTIONS In...

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