1. Lesson 4
Compare datas

2. Outliers A data value is an outlier if x < Q1 – 1.5(IQR) or
Statistics – numbers that characterize a data set, such as measures of center and spread.

3. Performance Task
Dealer A 14 13 15 12 16 17 18
Dealer B 16 17 15 20 18 19 10
The tables list the daily car sales of two competing dealerships.

4. A. Calculate the mean, median, interquartile range (IQR), and standard deviation for each data set. Compare the measures of center for the two dealers.

5. mean
median
IQR
Standard Deviation
Dealer A
Dealer B

6. B. Create a dot plot for each data set
B. Create a dot plot for each data set. Compare the distributions of the data sets.

7. C. Determine if there are any outliers in the data sets
C. Determine if there are any outliers in the data sets. If there are, remove the outlier and find the statistics for that data set(s). What was affected by the outliers?