Liberty Christian Academy Psyc 355 Exam 3 New

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Liberty Christian Academy Psyc 355 Exam 3 New · Question 1 0 out of 2.5 points The proportionate reduction in error is a measure of the: Selected Answer: · Question 2 2.5 out of ... 2.5 points If a negative relation exists between two variables, then low scores on one variable will be associated with ________ scores on the other variable. Selected Answer: · Question 3 0 out of 2.5 points In the equation for a regression line, the slope is the: Selected Answer: · Question 4 0 out of 2.5 points Using the Pearson correlation coefficient to analyze the relationship between two variables is appropriate only if the variables are: Selected Answer: scale variables. · Question 5 2.5 out of 2.5 points Data from the World Health Organization in 2013 were used to predict the life expectancy of men in a country from the life expectancy of women in the country. The resulting regression equation was Ŷ = 3.73 + 0.88(X). Using the regression equation, what would be the predicted life expectancy of men in a country in which the life expectancy of women is 65 years? Selected Answer: · Question 6 0 out of 2.5 points Which of these correlation coefficients allows a perfect prediction of scores on one variable from the knowledge of scores on the other variable? Selected Answer: · Question 7 2.5 out of 2.5 points As the standard error of estimate becomes larger, predictions become: Selected Answer: · Question 8 0 out of 2.5 points In the formula Ŷ = a + b (X), b is the: Selected Answer: · Question 9 2.5 out of 2.5 points A positive correlation between head size and foot size indicates that: Selected Answer: . · Question 10 2.5 out of 2.5 points The numerical value for a correlation ranges between ________ and ________. Selected Answer: · Question 11 2.5 out of 2.5 points Y is the symbol for a(n) ________ and Ŷ is the symbol for a(n) ________. Selected Answer: · Question 12 0 out of 2.5 points The standardized regression coefficient is symbolized by: Selected Answer: · Question 13 2.5 out of 2.5 points According to the guidelines published by Cohen (1988), a correlation value of –0.55 would be considered: Selected Answer: · Question 14 0 out of 2.5 points The regression line is also called the: Selected Answer: error of estimate. · Question 15 2.5 out of 2.5 points Regression to the mean occurs because extreme scores tend to become: Selected Answer: · Question 16 0 out of 2.5 points Regression is to ________ as correlation is to ________. Selected Answer: · Question 17 2.5 out of 2.5 points Nietfeld and Ender (2003) performed a study investigating the relation between the intelligence of student teachers and their efficacy in the classroom. This relation is depicted in the following scatterplot, which shows fictional data that replicate the pattern of performance observed by the researchers. Figure: Based on the scatterplot, what kind of relation between intelligence and teaching efficacy did Nietfeld and Ender find? Selected Answer: · Question 18 2.5 out of 2.5 points If a test actually measures what it is intended to measure, then that test: Selected Answer: · Question 19 2.5 out of 2.5 points With regression we are concerned about variability around the ________, rather than variability around the ________ which would be the case in t tests or ANOVAs. Selected Answer: · Question 20 2.5 out of 2.5 points In the equation Ŷ = 33.422 – 3.34(X1) + 0.094(X2), which statement is true? Selected Answer: · Question 21 0 out of 2.5 points The statistical analysis that allows us to use one scale variable to predict outcome on a second scale variable is called: Selected Answer: · Question 22 2.5 out of 2.5 points Psychometricians are concerned with: Selected Answer: · Question 23 2.5 out of 2.5 points Imagine that you've just read the results of a study that finds a positive correlation between gum chewing and life expectancy. Which of the following statements would be a statistically appropriate response to the results of the study? Selected Answer: · Question 24 2.5 out of 2.5 points A negative correlation between a hockey player's age and the number of minutes he spends in the penalty box indicates that: Selected Answer: · Question 25 2.5 out of 2.5 points What is the correlation between a person's weight measured in grams and the same person's weight measured in pounds? elected Answer: · Question 26 0 out of 2.5 points The following figure depicts the relation between a hockey player's age and the number of minutes he spent in the penalty box during the regular 2006–2007 season. The 18 players of the New Jersey Devils hockey team played in more than 40 games that season. Figure: Age and Penalty Minutes Based on the scatterplot, what is the relation between a hockey player's age and the number of minutes he spent in the penalty box? elected Answer: · Question 27 2.5 out of 2.5 points The Pearson correlation coefficient is a statistic that measures: Selected Answer: · Question 28 0 out of 2.5 points The Pearson correlation coefficient is a statistic that: Selected Answer: measures the causal association between scale variables. · Question 29 2.5 out of 2.5 points The sign of the correlation communicates: Selected Answer: · Question 30 0 out of 2.5 points To predict a single dependent variable from more than one independent variable, which statistical technique should be used? Selected Answer: · Question 31 2.5 out of 2.5 points Simple linear regression allows us to: Selected Answer: · Question 32 2.5 out of 2.5 points When using the Pearson correlation coefficient in hypothesis testing, we determine whether the correlation is: Selected Answer: · Question 33 2.5 out of 2.5 points What is the null hypothesis when testing for significance using the Pearson correlation coefficient? Selected Answer: ρ = 0 · Question 34 2.5 out of 2.5 points In a reanalysis of published studies, Twenge and Im (2007) found that for the time period 1958–2001, the need for social approval of people in the United States was negatively correlated with the U.S. violent crime rate during the same period (the correlation coefficient was –0.31). This correlation means that: Selected Answer: · Question 35 2.5 out of 2.5 points What kind of correlation would one expect to find between the severity of snowstorms and rates of attendance at college classes? Selected Answer: · Question 36 0 out of 2.5 points Below are the possible results of a one-way ANOVA with an alpha level set at .05. Which results are significant? Selected Answer: · Question 37 0 out of 2.5 points A one-way between-groups analysis of variance differs from an independent-samples t test in that the ANOVA Selected Answer: · Question 38 0 out of 2.5 points In a single-sample t-test with alpha = .05, we know that the mean of the sample is significantly different from the mean of the population if Selected Answer: · Question 39 0 out of 2.5 points A psychologist wants to determine whether different psychiatric diagnoses affect the length of stay for patients in a residential treatment facility. She collects data on length of stay for patients with three different diagnoses: affective disorders, drug-related disorders, and cognitive disorders. She compares the scores of these three groups. Which type of test should she use to analyze the results? Selected Answer: · Question 40 2.5 out of 2.5 points In an analysis of variance, you reject the null hypothesis when the F ratio is Selected Answer: [Show More]

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