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PYC3714-25-EX10
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Which of the following scenarios is most appropriate for using a Chi-square test of independence?
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You want to find out if psychology students have a higher IQ than all university students. The results of the University students show an IQ score of 120. Psychology students' IQ is found to be 125. The results show that the mean of Psychology students is higher than that of all University students. However, we cannot conclude that psychology students have a higher IQ. Why is this the case?
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The difference score (d = x2 - x1) is used in the calculation of the t-test statistic in the case of - - - - -.
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In a study examining the effect of sleep duration on academic performance, which is the dependent variable?
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John gets 70% for a Physics exam and would like to know where he stands in relation to the rest of the class. Suppose all students' mean mark is 60%, and the standard deviation is 6. How would you calculate the z-score?
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Which of the following scenarios best illustrates the use of an independent samples t-test rather than a dependent (paired) samples t-test?
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A researcher is studying students' preferred mode of transportation to campus. She surveys students and records whether they commute by car, bus, bicycle, or walk. Which of the following represents the sample space for this study?
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Use the following scenario to answer the question: A health psychologist is interested in understanding whether there's a relationship between how much sleep people get and their level of anxiety. She recruits 30 adults, and she records their average hours of sleep per night over a week and completes the Beck Anxiety Inventory (BAI) to measure their anxiety level. A Pearson correlation of r = - 0.80 is found. What kind of relationship can you infer?
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Which of the following scenarios best illustrates the use of a dependent (paired) samples t-test rather than an independent samples t-test?
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Which of the following best describes the direction of the dots in a scatterplot showing a positive correlation?
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