Box and Whisker Plots

What is the purpose of a box plot?

• To visually display the distribution of a data set, highlighting the median, quartiles, and potential outliers.

• To create a linear regression model for predicting outcomes.

• To summarize data using mean and standard deviation only.

• To represent categorical data using bars.

What does the third quartile (Q3) represent in a box plot?

• The mean of the entire data set.

• The median of the upper half of the data set.

• The lowest value in the data set.

• The highest value in the data set.

How do you interpret the whiskers in a box plot?

• The whiskers extend from the quartiles to the smallest and largest values within 1.5 IQR from the quartiles.

• The whiskers represent the mean and median of the data set.

• The whiskers indicate the range of the data excluding outliers.

• The whiskers show the standard deviation of the data points.

What does the first quartile (Q1) represent in a box plot?

• The median of the upper half of the data set.

• The median of the lower half of the data set.

• The highest value in the data set.

• The average of all values in the data set.

What is the relationship between the median and the mean in a skewed data set?

• In a skewed data set, the median is less affected by outliers and may differ significantly from the mean.

• In a skewed data set, the mean is always greater than the median.

• In a skewed data set, the median is always equal to the mean.

• In a skewed data set, the mean is less affected by outliers and may differ significantly from the median.

How do you calculate the range of a data set?

• Range = Maximum value + Minimum value.

• Range = Maximum value - Minimum value.

• Range = Average value - Minimum value.

• Range = Maximum value / Minimum value.

How can you determine which data set has a larger IQR?

• By comparing the means of the data sets

• By comparing the values of Q3 and Q1 for each data set; the larger difference indicates a larger IQR.

• By looking at the range of the data sets

• By calculating the standard deviation of each data set

What is the Interquartile Range (IQR)?

• The IQR is the average of all data points in a set.

• The IQR is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set.

• The IQR is the median of the data set.

• The IQR is the range of the data set divided by the number of data points.

What is the significance of the median in a data set?

• The median is the middle value that separates the higher half from the lower half of the data set.

• The median is the average of all values in the data set.

• The median is the value that occurs most frequently in the data set.

• The median is the range of the data set.

What does a box plot tell you about the spread of data?

• It shows how data is distributed, including the range and IQR, indicating variability.

• It provides the mean and median of the data set.

• It displays the frequency of data points in each category.

• It indicates the mode and standard deviation of the data.