Descriptive Statistics in Psychology Quiz

What is the main purpose of descriptive statistics in psychology?

• Predict future trends in data

• Summarize, organize, and simplify data characteristics

• Establish causal relationships

• Evaluate statistical significance

Which of the following is an example of categorical data?

• Height

• IQ score

• Ethnicity

• Number of children

What measure of central tendency is less affected by extreme values?

• Range

• Mean

• Median

• Mode

Which measure of variability indicates the average deviation of data points from the mean?

• Range

• Variance

• Standard deviation

• Median

What type of distribution is characterized by a symmetrical bell-shaped curve?

• Uniform distribution

• Bimodal distribution

• Skewed distribution

• Normal distribution

What visual representation displays the median, quartiles, and potential outliers in a dataset?

• Line graph

• Scatterplot

• Histogram

• Box plot

What statistic measures the strength and direction of the relationship between two continuous variables?

• Correlation coefficient

• Standard deviation

• Range

• Variance

What does a negative value of Pearson's correlation coefficient indicate?

• Weak positive correlation

• Perfect positive correlation

• No correlation

• Perfect negative correlation

What term describes the lack of symmetry in a distribution?

• Kurtosis

• Standard deviation

• Skewness

• Variance