Histograms
________________ is a way to organize data you collect.
You can organize statistics by making a ________________ or finding ________________
that represent a set of ___________.
Histogram: a type of _______ graph used to display numerical _________ that have been
organized in ____________ _______________.
Draw a Histogram
Ex. The frequency table below shows the amount of caffeine in certain types of
tea. Draw a histogram to represent the data.
Caffeine Content
Of Certain Types Of Tea
Caffeine (mg) Tally Frequency
1-20 7
21-40 8
41-60 2
61-80 0
81-100 2
Interpret a Histogram
VOTERS How many people were younger than 33 when
they first voted?
In what measurement does the median occur?
Step 1: Add the frequencies.
Step 2: Take half.
Step 3: Count up to the distribution bar.