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Histogram
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tarix | 06.05.2018 | ölçüsü | 16,3 Kb. | | #43110 |
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HISTOGRAMS
What are intervals again?
A _____________________is a bar graph that displays numerical data in intervals.
Example: The students of Monster High took a survey of the ages of everyone attending the “Ghouls Rule” movie. The results are in the histogram below.
Answer the following:
1) How many people from ages 10-19 attended the movie? ___________________
2) How many people aged 50 or over attended the movie? _____________________
3) How many kids younger than 20 attended the movie? _______________________
4) How many total people attended the movie? _______________________
5) What does the gap at 40-49 mean? ___________________________________________________
6) Can you tell whether a 25-year-old attended the movie? ____________ Why or why not?
_____________________________________________________________________________________
7) Why must the bars on a histogram always be touching (unless there is a gap in data)?
_____________________________________________________________________________________
MAKING A HISTOGRAM
FIRST STEP: ____________________________________________________________________________
Examples:
Data Range
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Scale
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Intervals
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3 to 46
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0 – 50
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Of 10: 0-10, 11-20, 21-30, 31-40, 41-50
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1 to 288
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0 – 300
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Of 50: 0-50, 51-100, 101-150, 151-200, 201-250, 251-300
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4.1 to 5.4
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4 – 5.5
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Of 0.3: 4-4.2, 4.3-4.5, 4.6-4.8, 4.9-5.1, 5.2-5.4
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52 to 964
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SECOND STEP: _____________________________________________________
Example: Use the data in the table to make a frequency table with intervals:
Since the data above ranges from 15 to 188, the scale will be ______________
and we can use intervals of _________________
Pages Read per Student Last Weekend
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NUMBER:
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FREQUENCY:
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THIRD STEP: ________________________________________________________
Dostları ilə paylaş: |
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