Unformatted text preview: n determine the IQR by completing
Q3 – Q1.
1, 5, 9, 8, 6, 1, 2, 3, 7, 4, 20 Find the IQR (the same data as the last slide) Outliers An
An Outlier in any graph of data is an
individual observation that falls outside the
overall pattern of the graph.
To determine whether or not a dataset
contains outliers, complete the following
Outliers Step 1: Step 2: Step 3:
Step Step 4: Step
Step Determine the IQR of the data
Multiply the IQR by 1.5
Subtract 1.5•IQR from Q1
Add 1.5•IQR to Q3 5: Use the two values from steps 3 & 4
to create a range. Step 6: Any data point outside your
determined range is an outlier.
determined Box Plots
A box plot (aka Box-and-Whiskers Plot)
allows us to graphically represent the fiveallows
number summary of the data. The
The box plot gives us information on Range,
extrema, quartiles, median, IQR and outliers.
extrema, Therefore, the box plot shows us how the data
is spread over the entire range.
is Box Plots
Box Use the data to create a box plot:
1, 5, 9, 8, 6, 1, 2, 3, 7, 4, 20 Modified Box Plots
A modified box plot plots outliers as
isolated Use the data to create a modified box plot:
1, 5, 9, 8, 6, 1, 2, 3, 7, 4, 20 Box Plots on the Calculator
Box Comparing Box Plots
Comparing Comparing Box Plots
Homework Read and take notes textbook pp. 73 – 83 Complete Chapter Quiz worksheet “Activity 6-8” 3 Project due September 12th Tuesday!...
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- Winter '13
- Interquartile range, box plots