Descriptive Statistics Quiz

What is the primary purpose of descriptive statistics?

• To make predictions about future data

• To test hypotheses

• To describe and summarize collected data

• To establish causal relationships

Which measure of central tendency is resistant to outliers?

• Range

• Mode

• Median

• Mean

How is the mean calculated?

• By identifying the most frequently occurring value

• By finding the middle value in a data set

• By dividing the sum of all observations by the number of observations

• By subtracting the smallest value from the largest value

What does the standard deviation measure?

• The difference between the highest and lowest values

• The average distance of each data point from the mean

• The most common value in a data set

• The average value of a data set

What is the interquartile range?

• The most frequently occurring value

• The difference between the first and third quartiles

• The average of all data points

• The range of the entire data set

What is a frequency table used for?

• To display the relationship between two variables

• To identify outliers in a data set

• To show how often each distinct value appears in a data set

• To calculate the mean of a data set

What is a contingency table also known as?

• Frequency table

• Cross tab

• Pie chart

• Histogram

Which chart is best for showing the distribution of a single variable?

• Pie chart

• Histogram

• Line chart

• Bar chart

What type of plot is used to display the distribution of data based on a five-number summary?

• Scatter plot

• Rainbow plot

• Box plot

• Violin plot

Which plot is used to show the density of data at different values?

• Box plot

• Violin plot

• Pie chart

• Bar chart