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 read a stem-and-leaf plot?

Back

To read a stem-and-leaf plot, identify the 'stem' (the leading digit(s)) and the 'leaf' (the trailing digit). For example, in the stem '8' and leaf '2', the number is 82.

Front

What is a dot plot?

Back

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

Front

How do you create a dot plot?

Back

To create a dot plot, draw a horizontal line (number line) and place a dot above the corresponding value for each data point.

Front

What is the purpose of a frequency table?

Back

A frequency table is used to organize data into categories and show how often each category occurs.

Front

How do you find the mode in a data set?

Back

The mode is the value that appears most frequently in a data set.

Front

What is the median of a data set?

Back

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

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 mean of a data set?

Back

To calculate the mean, add all the values together and divide by the number of values.

Front

What does it mean to have a score in the 80's?

Back

A score in the 80's refers to any score that is between 80 and 89, inclusive.