Dot Plots, Histograms, and Box Plots

Front

What is a dot plot?

Back

A dot plot is a statistical chart that consists of dots plotted on a number line, where each dot represents a data point.

Front

How do you interpret a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, where the data is divided into intervals (bins) and the height of each bar represents the frequency of data points in that interval.

Front

What is a box plot?

Back

A box plot, or whisker plot, is a standardized way of displaying the distribution of data based on a five-number summary: minimum, first quartile, median, third quartile, and maximum.

Front

What does the median represent in a data set?

Back

The median is the middle value of a data set when it is ordered from least to greatest. It divides the data into two equal halves.

Front

How do you find the mean of a data set?

Back

To find the mean, add all the numbers in the data set together and then divide by the total number of values.

Front

What is the purpose of using intervals in histograms?

Back

Intervals (or bins) in histograms group data points into ranges, making it easier to visualize the distribution and frequency of data.

Front

What does the height of a bar in a histogram indicate?

Back

The height of a bar in a histogram indicates the frequency of data points that fall within the corresponding interval.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the first quartile (Q1) and the third quartile (Q3) and measures the spread of the middle 50% of the data.

Front

How can you identify outliers using a box plot?

Back

Outliers can be identified in a box plot as points that fall outside the whiskers, which typically extend 1.5 times the IQR from the quartiles.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the median of the lower half of a data set, representing the 25th percentile.