Exam 9: Using Statistics to Answer Questions

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scenario Nora would like to conduct an experiment to determine whether behavior modification techniques can help children eliminate bedwetting. She obtains a sample of children who wet the bed and randomly assigns half to the behavior modification therapy and half to a control group who receive no therapy. After six months, she measures how often children in each group wet the bed. -Suppose Nora used α = .05 for a two-tailed test. According to the t distribution table, what value from the table did Nora's t value have to exceed in order for it to be considered significant?

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Identify the independent variable in this study.

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The _________ is the only measure of central tendency that can be used for nominal data.

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Which of the following is NOT one of the four scales of measurement?

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The scale of measurement for the _________ variable determines the type of statistical test you use to evaluate your data at the completion of your project.

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Read the following article and answer the questions that follow: Ozkan, T., & Lajenen, T. (2005). Masculinity, femininity, and the Bem Sex Role Inventory in Turkey. Sex Roles, 52, 103-110. -How is this study a replication with extension?

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To graph a qualitative variable, use a ________ graph, and to graph a quantitative variable, use a ___________ graph.

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Distinguish between a Type I and a Type II error. How can a researcher minimize the probability of making a Type I error? How can a researcher minimize the probability of making a Type II error?

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Which scale of measurement provides the least amount of information?

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Consider the following scores: 2, 2, 2, 4, 5, 9. What is the median?

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Qualitative categories

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In a normal distribution,

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What are the two main branches of statistics?

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Correlation coefficients are used for

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What is a bar graph? Under what circumstances do researchers use a bar graph? Draw a sample bar graph.

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Why is it important to understand scales of measurement?

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What is the level of measurement for the dependent variable?

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Number of errors on a math test represents a(n) __________ scale of measurement.

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Joseph would like to find a measure of central tendency for his occupation variable (measured as "sales," "teacher," or "other"). Joseph should use the

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The mean can be calculated for

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