Exam 15: Frequency Distribution, Crosstabulation, and Hypothesis

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Lambda assumes that the variables are measured on an ordinal scale.

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In the parametric case of means for two independent samples, the hypotheses take which form? A) H0: a12 = a22 H1: a12 × a22

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In tests of associations, the null hypothesis is that there is no association between the variables (H0:......is NOT related to. ).

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Which statement is not correct about the null hypothesis?

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Which program or function listed below is not useful for conducting nonparametric tests?

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The F statistic is computed as the ratio of two sample variances.

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Mean, median, and mode are measures of variability.

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is a test statistic that measures the association between two ordinal- level variables. It makes an adjustment for ties and is most appropriate when the table of variable is square.

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is an average of the two asymmetric lambda values. It does not make an assumption about which variable is dependent.

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A statistical technique that describes two or more variables simultaneously and results in tables that reflect the joint distribution of two or more variables that have a limited number of categories or distinct values is a .

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Which of the following statements is not correct about the alternative hypothesis?

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The is used to test the statistical significance of the observed association in cross- tabulation.

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The mode represents the highest peak of the distribution.

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The tests the goodness of fit of the observed number of observations in each category to the number expected under a specified binomial distribution.

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are hypothesis testing procedures that assume that the variables are measured on a nominal or ordinal scale.

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Suppose we wanted to test the hypothesis that the mean familiarity rating exceeds 4.0, the neutral value on a seven- point scale. The hypotheses may be formulated as _ . A) H0: µ c 4.0 H1: µ > 4.0

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Frequency data may be used to construct a histogram, or a vertical bar chart.

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Nonparametric tests are used when the independent variables are nonmetric.

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The is the most appropriate measure of central tendency for interval or ratio data.

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For a given level of α, increasing the sample size will decrease fi, thereby increasing the power of the test.

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