Data - Frequency Tables and Line Plots. Joseph Williams Modified by Charlotte Stripling. M7D1.b Construct frequency Distributions Objective : Create and interpret frequency tables and line plots. Vocabulary. Data - information, often given in the form of numbers or categories.
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Frequency Tables and Line Plots
M7D1.b Construct frequency Distributions
Objective: Create and interpret frequency tables and line plots.
Data - information, often given in the form of numbers or categories.
Frequency Table – a table that displays the number of times each item or category occurs in a data set.
Line Plot – a number line diagram that uses X marks to show the frequencies of items being tallied.
Numerical Data: Data consisting of numbers, not categories.
Numerical Questions: How many books have students read last month?
Is a visual of the frequency distribution. Line plots are NOT used for categorical data.
Draw a number line whose scale starts at or before the minimum data value and stops at or after the maximum data value. Use a consistent increment.
When the items being tallied are numbers, a line plot can be used to visually display numerical data. A line plot uses X marks above a number line to show the frequencies.
The X marks above the number line show the frequencies.
The Number Line shows the number of books read.
Number of Books Read
Categorical data: data that can be placed into categories.
Categorical question: What is your favorite color?
NOTE: Categorical data can be shown in a frequency table but not a line plot.
Now look at the Frequency Tables and the Line Plots from your notes to see if you can identify any outliers, clusters or gaps.