Exam 15: Testing for Differences Between Groups and for Predictive Relationships
Exam 1: The Role of Marketing Research76 Questions
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Exam 5: Qualitative Research Tools75 Questions
Exam 6: Secondary Data Research in a Digital Age76 Questions
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Exam 9: Conducting Marketing Experiments75 Questions
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Exam 11: Questionnaire Design74 Questions
Exam 12: Sampling Designs and Sampling Procedures76 Questions
Exam 13: Big Data Basics: Describing Samples and Populations73 Questions
Exam 14: Basic Data Analysis76 Questions
Exam 15: Testing for Differences Between Groups and for Predictive Relationships74 Questions
Exam 16: Communicating Research Results75 Questions
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When the difference between two groups is measured, bivariate statistics are used.
(True/False)
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____________________ in regression analysis refers to how strongly interrelated the independent variables in a model are.
(Short Answer)
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Which analysis is portrayed by the equation: Y = bo + 1X1 + 2X2 + 3X3...+ nXn?
(Multiple Choice)
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In using the Z-test for comparing two proportions, the null hypothesis is typically stated as ____.
(Multiple Choice)
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The degrees of freedom are calculated as df = n - 1 when using the t-test for comparing two means, where n = n1 + n2.
(True/False)
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The independent samples t-test tests the differences between means from no more than four independent samples or groups.
(True/False)
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Once a variable has more than four categories, a cross-tabulation table has a stronger advantage in its simplicity in communicating the result.
(True/False)
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The chi-square test tests the significance of the relationship shown in an R X C contingency table in which R stands for row and C stands for column.
(True/False)
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Choosing the right statistic boils down to what type and how many variables are involved in a particular research question or hypothesis.
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The null hypothesis for an ANOVA test comparing the means of three groups is: 1 = 2 = 3.
(True/False)
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In a regression equation, the beta coefficients indicate the effect on the dependent variable of a 1-unit increase in any of the independent variables.
(True/False)
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Suppose that you are using a 9-point rating scale to compare men who have an annual income over $50, 000 (Group 1)with men who have an annual income less than or equal to $50, 000 (Group 2)with regard to their assessment of a new product.There are forty men in Group 1 and they have a mean of 7 and a standard deviation of 2.5, while the 35 men in Group 2 have a mean of 5 and a standard deviation of 1.4.What is the approximate value of t using the t-test?
(Multiple Choice)
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Consider the regression equation: Y = 98.3 +.35X1 + 22.3X2, the predicted value for Y when X1 = 3 and X2 = 5 is ____.
(Multiple Choice)
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The statistical test used to determine whether there is more variability in the scores of one sample than in the scores of another sample is the ____________________.
(Short Answer)
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A Z-test for differences of proportions requires a sample size greater than 100.
(True/False)
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A researcher hypothesizes that males and females differ with respect to attitude toward sports sponsorships.To investigate this hypothesis that these two groups' attitudes differ, the researcher will use a ____.
(Multiple Choice)
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Statistical methods that permit the study of three or more variables at the same time are called ____________________ statistical analysis.
(Short Answer)
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When students tardiness is used to predict the test performance of students in a reqression equation, student tardiness is the ____ variable and test performance is the ____ variable.
(Multiple Choice)
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The chi-square test involves comparison of the observed frequencies of the groups with the expected frequencies of the groups.
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