Stem&Leaf and Dot Plots

Front

What is a stem-and-leaf plot?

Back

A stem-and-leaf plot is a method of displaying quantitative data in a graphical format, similar to a histogram, to retain the original data values while showing their distribution.

Front

How do you create a stem-and-leaf plot?

Back

To create a stem-and-leaf plot, separate each data point into a 'stem' (the leading digit or digits) and a 'leaf' (the trailing digit). List the stems in a vertical column and write the leaves next to their corresponding stems.

Front

What is a dot plot?

Back

A dot plot is a simple statistical chart that consists of dots plotted above a number line, representing the frequency of data points.

Front

How do you interpret a dot plot?

Back

To interpret a dot plot, count the number of dots above each value on the number line to determine the frequency of each data point.

Front

What is the median in a data set?

Back

The median is the middle value of a data set when it is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you find the median of a data set?

Back

To find the median, first arrange the data in ascending order. If the number of data points is odd, the median is the middle number. If even, average the two middle numbers.

Front

What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. A data set may have one mode, more than one mode, or no mode at all.

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How do you calculate the range?

Back

To calculate the range, subtract the smallest value in the data set from the largest value.

Front

What is a frequency table?

Back

A frequency table is a table that displays the number of times each value occurs in a data set.