warm up – find the mean, median & mode of each set. data set i data set ii
TRANSCRIPT
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Warm Up – Find the mean, median & mode of each set.
Data Set I
Data Set II
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Solution
• Data Set IMean is 483.8461538Median is 400Mode is 300
Data Set IIMean is 474Median is 350Mode is 300
Data Set II
Data Set I
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Boxplots
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When to use which measure of center…
Use mean when you DO NOT have an outlier
Use median when you DO have an outlier
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To create a Box Plot you need the 5 Number Summary
Minimum- smallest value
Quartile 1 (Q1) – median of lower half of data Median- middle value
Quartile 3 (Q3) – median of upper half of data
Maximum – largest value
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Where does everything go?....
Min Q1 Median Q3 Max
Lower Upper Quartile Quartile
“median of lower half” “median of upper half”
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Example 1
Create a box plot of the data below 59, 27, 18, 78, 61, 91, 52, 34, 54,
93, 100, 87, 85, 82, 68
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Luckily….
Our calculator will tell you your 5 number summary
Step 1: Enter the height data in L1.
STAT EDIT
Step 2: STAT CALC 1: 1-Var Stats Enter
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Example 2:Use the following data set to create a
five-number summary and graph the box-and-whisker plot
87, 7, 41, 50, 15, 220, 23, 99, 11, 45, 11, 61, 3, 39, 21
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SolutionMinimum – 3
Maximum – 220Median – 39
Q1 – 11Q3 – 61
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Use the data below to create the following:
1)Frequency Table2)Histogram3)Box Plot4)Describe the distribution using SOCS