Exam 17: Chi-Square Tests

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You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females    -Conduct the appropriate analysis. -Conduct the appropriate analysis.

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χ\chi 2 (1, N = 71) = 4.99, p < .05.

What are the assumptions of the χ\chi 2 test of independence?

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The assumptions of the χ\chi 2 test are that the sample is random, the observations are independent, the data are nominal, and the number of observations in each cell should not be less than 5.

If I calculated the phi coefficient to be .35, what would this mean?

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If RT = 25, CT = 40, and N = 75, what is the expected frequency?

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Assuming σ\sigma 2 = 4.56 and N = 80, what is the phi coefficient?

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You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females    -What statistical test should be used to analyze these data? -What statistical test should be used to analyze these data?

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If I calculated the phi coefficient to be .65, what would this mean?

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According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink alcohol now than they did in 1985. A sample of 100 adults is asked about their current drinking habits and 67 reported drinking and 33 reported not drinking. -What is χ\chi 2obt?

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You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females    -Should H0 be rejected? What should the researcher conclude? -Should H0 be rejected? What should the researcher conclude?

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The formula for calculating the phi coefficient is _____.

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You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females You notice in your introductory psychology class that more men tend to sit near the door and more women opposite the door. In order to determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data are given below. Males Females    -Identify H0 and Ha for this study. -Identify H0 and Ha for this study.

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If I calculated the phi coefficient to be .15, what would this mean?

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According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink alcohol now than they did in 1985. A sample of 100 adults is asked about their current drinking habits and 67 reported drinking and 33 reported not drinking. -What is (are) the df for this test?

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For the ?2 test of independence, which of the following formulas is used to calculate the expected frequencies?

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The measure of effect size used with the χ\chi 2 test of independence is:

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Parametric is to nonparametric as _____ is to _____.

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Assuming σ\sigma 2= 3.49 and N= 75, what is the phi coefficient?

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What is the χ\chi 2cv if χ\chi 2obt = 3.99, with df = 1

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According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink alcohol now than they did in 1985. A sample of 100 adults is asked about their current drinking habits and 67 reported drinking and 33 reported not drinking. -What is χ\chi 2cv?

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If RT = 75, CT = 50, and N = 100, what is the expected frequency?

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