Quiz

1 Which of the following is correct? An independent variable (IV) is manipulated; the dependent variable (DV) is calculated An IV is measured; the DV is manipulated An IV is calculated; the DV is measured An IV is manipulated; the DV is measured

2 Which of the following is correct? The variance is the squared deviation of scores around the mean The variance is the square root of the average deviation of scores around the mean The variance is the squared average deviation of scores around the mean The variance is the average squared deviation of scores around the mean

3 Which of the following is correct? The variance is the squared standard deviation The standard deviation is the variance multiplied by the mean The variance is the square root of the standard deviation The variance is the standard deviation divided by the mean

4 What is the best answer? ANOVA calculates and compares the variance of two experimental conditions ANOVA calculates and compares the variability accounted for by IVs relative to the residual (error) variability ANOVA compares the variance of a control group and an experimental group ANOVA calculates the variance of three or more experimental groups

5 Which of the following is correct? F(1,r) = 1/t(r) t(r) = 1/F(1,r) F(1,r) = t2(r) F(1,r) = sqrt(t2(r))

6 Which of the following is correct? A sum of squares is the squared average deviation of a set of scores around their mean A sum of squares is the squared average deviation of a set of scores around their median A sum of squares is the sum of deviations of a set of scores around their mean A sum of squares is the squared deviation of a set of scores around the arithmetic mean

7a Which of the following is correct? There is only one normal distribution There are two normal distributions There are as many normal distributions as there are t distributions There is an infinite number of normal distributions

7b Which of the following is correct? a normal distribution is symmetric and can be plotted as a bell-shaped curve is positively skewed is negatively skewed is platikurtic and can be plotted as a bell-shaped curve

8 A standard error is the standard deviation of the median the standard deviation of the mean the standard deviation of a set of scores the residual variability in a normal distribution

9 Which of the following is correct? ratio: data with a relative zero point; interval: data with equal intervals; ordinal: ranked data interval: data with equal intervals; ordinal: data with equal frequencies of ranks; nominal: categories rather than numbers ratio: data with an absolute zero point; interval: data with equal intervals; nominal: data with categories rather than numbers interval: data with equal intervals; ordinal: equal frequencies of ranks; nominal: dichotomised numerical values

10a Which of the following is incorrect? A correlation coefficient represents the extent of association between two variables An unstandardised regression coefficient represents the amount of change in the criterion variable as a result of one unit change in a predictor The range of the correlation coefficient is restricted The range of the unstandardised regression coefficient is restricted

10b Which of the following is correct? A correlation coefficient is a constant fraction of the corresponding multiple regression coefficient A correlation coefficient is the percentage of variability explained by the regression equation with a corresponding multiple regression coefficient A correlation coefficient equals the multiple regression coefficient if deviation scores are used A correlation coefficient is independent of measurement unit of data, but regression coefficients differ depending on unit of measurement

11 Which of the following is correct? -10  -11 = 110 -10  10 = 100 11  -10 = 110 10  -12 = 120

12 Which of the following is incorrect? -5 + 7 = 2 5 + -8 = -3 -7 + -5 = -2 1 - -7 = 8

13 Which of the following is correct? 3  4 + 5 = 27 3 + 2  5 = 25 5 + -3  7 = 14 4 4 + 2 = 18

14 Which of the following is incorrect?  

15 Which of the following is correct? -10  -11 = -110 -10  11 = 110 -11  -10 = 110 11  -10 = 110

16 Which of the following is correct? z = mean/SD z = (X - mean)/SD z = (X - mean)/r z = SD/mean

17 Which of the following is incorrect?

18 Which of the following is correct? |-2| = -2  2 |10| = 10  10 |7| = -7 |-4| = 4