April 29, 2014

Chapter 6-4: Line Plots, Frequency Tables, and Histograms

April 29, 2014

Words to know:

Frequency: the number of times a value in the data occurs.

Frequency Table: tells the number of times an event, category, or group occurs.

Example of a frequency table

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Step 1: create a table. In this example, for each fingerprint, make a tally mark in the appropriate row.

Step 2: Count the number of tally marks for each pattern and record the number of tallies under the column titled frequency.

This is a frequency table

April 29, 2014

Independent Practice:

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Words to know:

Line plot: uses a number line and x's or other symbols to show frequencies of values

Example of a line plot

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Step 1: Draw a number line

Step 2: For each student, use an x on the number line to represent how many miles he or she ran

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Independent Practice:

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Step 1: choose equal intervals (example: intervals of 5)

Step 2: Find the number of data values in each interval. Write these number in the "frequency" row.

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Independent Practice:

Use the following data to make a frequency table with intervals

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Words to know:

Histogram: a bar graph that shows the number of data items that occur within each interval.

Example of a histogram

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Use this frequency table to create a histogram

Step 1: Choose an appropriate scale and interval.Step 2: Draw a bar for the number of states in each interval. The bars should touch but not overlap.Step 3: Title the graph and label the axes.

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Independent Practice:

Use the frequency table you made in the last example to make a histogram.

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Additional Practice: