4/1 Best Measure of Center Practice

1

Gabriella’s quiz grades are shown below. Which is the outlier?
88, 92, 92, 96, 98, 20

1

A data set is shown below. Which is the outlier? 56, 64, 73, 59, 98, 65, 59

1

A data set is shown below. Which is the outlier?
48, 56, 55, 60, 58, 50, 9, 50

1

Calculate the mean, median, and mode of the data 3,2,6,4,3,5,16 with and without the outlier. 

Round to the tenths place if necessary.
With outlier
Mean _______ 
Median _______ 
Mode _______ 

Without outlier
Mean _______ 
Median _______ 
Mode _______ 

What affect does the outlier have on the mean when it is counted? (same, increased, or decreased) _______ 
What affect does the outlier have on the median when it is counted? (same, increased, or decreased) _______ 
What affect does the outlier have on the mode when it is counted? (same, increased, or decreased) _______ 

1

Calculate the mean, median, and mode of the data 20, 17, 5, 19, 22, 18, 17 with and without the outlier. 
Round to the tenths place if necessary.
With outlier
Mean _______ 
Median _______ 
Mode _______ 

Without outlier
Mean _______ 
Median _______ 
Mode _______ 

What affect does the outlier have on the mean when it is counted? (same, increased, or decreased) _______ 
What affect does the outlier have on the median when it is counted? (same, increased, or decreased) _______ 
What affect does the outlier have on the mode when it is counted? (same, increased, or decreased) _______ 