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Quiz

Test your knowledge of basic statistical concepts with this quiz. Answer questions on variables, variance, ANOVA, distributions, correlation, and more.

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Quiz

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  1. Quiz

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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))

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 11 Which of the following is correct? • -10  -11 = 110 • -10  10 = 100 • 11  -10 = 110 • 10  -12 = 120

  15. 12 Which of the following is incorrect? • -5 + 7 = 2 • 5 + -8 = -3 • -7 + -5 = -2 • 1 - -7 = 8

  16. 13 Which of the following is correct? • 3  4 + 5 = 27 • 3 + 2  5 = 25 • 5 + -3  7 = 14 • 4 4 + 2 = 18

  17. 14 Which of the following is incorrect?

  18. 15 Which of the following is correct? • -10  -11 = -110 • -10  11 = 110 • -11  -10 = 110 • 11  -10 = 110

  19. 16 Which of the following is correct? • z = mean/SD • z = (X - mean)/SD • z = (X - mean)/r • z = SD/mean

  20. 17 Which of the following is incorrect? • 7.3E-10 = 0.00000000073 • 6.3E-3 = 0.0063 • 4.1E2 = 41 • 8.5E-5 = 0.000085

  21. 18 Which of the following is correct? • |-2| = -2  2 • |10| = 10  10 • |7| = -7 • |-4| = 4

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