Exam 16: Statistical Testing of Differences and Relationships

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Hypotheses about frequency distributions that involve one or more nominally scaled variables can be tested using ____________.

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Type II error is most closely related to which of the following?

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If a particular difference is large enough to be unlikely to have occurred because of chance or sampling error,then the difference is statistically significant.

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In the decision that the null hypothesis is accepted,there must be enough evidence in the data that the alternative hypothesis is correct.

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Hypotheses are stated in two basic forms: __________ & _____________.

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Which of the following is not a step in hypothesis testing?

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What type of data would be necessary to have when testing for differences in means?

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Researchers cannot perform statistical testing on nominal data.

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A(n)________________ is a standard used to determine whether to reject or fail to reject the null hypothesis.

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For comparing means,most statistical software packages use which test?

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What is the purpose of statistical inferences?

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Researchers must be careful to distinguish statistical significance from:

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A researcher is interested in comparing product rating scores between males and females.By drawing a sample of males and a sample of females,the researcher needs to find a statistical test that applies to____________.

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What kind of error is being made if the researcher fails to reject the null hypothesis when it is,in fact,false?

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Which of the following is the appropriate statistical test when examining cross tabulations?

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A consultant has collected 700 usable responses via a probability sample concerning political opinions.After analyzing each respondent's political ideology,he/she divides the respondents into two groups,moderate liberals and moderate conservatives.Further,the consultant asks respondents the following: How likely are you to vote for increasing property taxes in the next election? (1)very unlikely (2)somewhat unlikely (3)undecided (4)somewhat likely (5)very likel The consultant wants to determine if the moderate conservatives differ significantly from moderate liberals concerning how they'll vote on the property tax issue in the next election.How should the data be analyzed?

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A researcher is attempting to determine which ethnic group is more likely to go to the movies at a movie theatre.The dependent variable is metric.Which of the following tests is most appropriate?

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The chi-square test enables the research analyst to determine whether an observed pattern of frequencies corresponds to,or fits,an "unexpected pattern."

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When do you say the difference between two numbers is statistically significant?

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Explain the notions of mathematical differences,managerially important differences,and statistical significance.

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