Statistics for Psychology MCQs

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1: Which statistical test should be used to determine if there is a significant difference between the means of two related groups?

A) Independent samples t-test
B) Paired samples t-test
C) Chi-square test
D) One-way ANOVA
Answer: B) Paired samples t-test

Question 2: What does it mean if the correlation coefficient (r) is close to +1.00?

A) There is a strong negative relationship between variables
B) There is a strong positive relationship between variables
C) There is no relationship between variables
D) The data are not normally distributed
Answer: B) There is a strong positive relationship between variables

Question 3: Which statistical test should be used to analyze the relationship between three or more variables simultaneously?

A) Pearson correlation coefficient
B) Multiple regression analysis
C) Independent samples t-test
D) Factorial ANOVA
Answer: B) Multiple regression analysis

Question 4: What does it mean if a distribution is negatively skewed?

A) The mean is less than the median
B) The mean is greater than the median
C) The data are evenly distributed around the mean
D) The data are clustered at both ends of the distribution
Answer: A) The mean is less than the median

Question 5: Which statistical test should be used to compare means across two or more independent groups?

A) Paired samples t-test
B) Chi-square test
C) Independent samples t-test
D) One-way ANOVA
Answer: D) One-way ANOVA

Question 6: What does a confidence level of 95% indicate in the context of confidence intervals?

A) There is a 5% chance that the sample mean is different from the population mean
B) There is a 95% chance that the sample mean is different from the population mean
C) There is a 5% chance that the population mean falls within the interval
D) There is a 95% chance that the population mean falls within the interval
Answer: D) There is a 95% chance that the population mean falls within the interval

Question 7: What is the purpose of conducting a factor analysis in psychometrics?

A) To identify underlying factors or dimensions within a set of variables
B) To analyze differences between groups
C) To determine the strength of a relationship between variables
D) To calculate the reliability coefficient of a test
Answer: A) To identify underlying factors or dimensions within a set of variables

Question 8: Which of the following is a measure of central tendency that is most appropriate for ordinal data?

A) Mean
B) Median
C) Mode
D) Standard deviation
Answer: B) Median

Question 9: When should a researcher use a non-parametric test instead of a parametric test?

A) When the data are normally distributed
B) When the sample size is large
C) When the data do not meet assumptions of normality or homogeneity of variance
D) When the data are measured on a ratio scale
Answer: C) When the data do not meet assumptions of normality or homogeneity of variance

Question 10: What is the purpose of conducting a chi-square test of independence?

A) To analyze the relationship between two continuous variables
B) To compare means across multiple groups
C) To determine if there is a significant association between two categorical variables
D) To calculate the effect size of an intervention
Answer: C) To determine if there is a significant association between two categorical variables

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