PSY613 Flashcard 12

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Below is a histogram of the time (in minutes) it took 61 students in PSYCH 613 to complete Quiz 11 (binwidth = 10).

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TRUE

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What is the standard error of the time it took 61 PSYCH 613 students to complete Quiz 11 if the standard deviation is 217.35 minutes? Options: 27.83, 28.26, 27.60, 28.83

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27.83

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What is the best definition of statistical significance?

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Assuming that the null hypothesis is true and the study is repeated an infinite number of times by drawing random samples from the same population(s), less than (usually) 5% of these results will be more extreme than the current result

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All other things being equal (e.g., sample size), what is true of an independent study design compared to a dependent study design?

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It has less power to detect an effect (if one exists).

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TRUE or FALSE? In a one-way ANOVA, k - 1 non-orthogonal contrasts can perfectly decompose the variation in SS_B, where k is the number of levels of the independent variable.

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FALSE

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How much variance between two variables has been explained if their correlation is .60?

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36%

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Which of the following is the best and most complete way to report the results of a regression examining domestic violence as a predictor of depressive symptoms?

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Total amount of domestic violence experienced over the past year is related to current total depressive symptoms, F(1, 198) = 5.43, p = .021, R² = .03, such that the more domestic violence exposure reported the greater amount of depressive symptoms currently being experienced, b = .01, p = .021

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What conclusions can you make from the output of the multiple regression analysis for the music app Spotifly? Options: Adding the extra three predictors in Step 2 did not explain more of the variance than in Step 1., Both the user's number of legs and the user's number of wings significantly predicted the months they subscribed to Spotifly., Users' incomes had the highest standardized coefficient of all the predictors., Gender was coded as a binary variable, and therefore, is not suitable for a regression.

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Users' incomes had the highest standardized coefficient of all the predictors.