1. MEAN – MEDIAN – MODE – Outlier – Range – Mode, mode, mode the most
Measures of Central Tendency
MEAN –
MEDIAN –
MODE –
Outlier –
Range –
1. Find the mean, median, and mode. Which measure of central tendency best describes the data?
Weights of channel catfish in pounds
Mean, Median and Mode Song
Tune – “Row, Row, Row Your Boat”
the average
Use the mean to describe the middle of a set
of data that DOES NOT have an outlier.
Mode, mode, mode the most
Average is the mean
Median, median, median,
median’s always in between
the middle value in the set when the numbers are arranged
in order. If there are two in the middle, find their average.
Use the median to describe the middle of a set of data
that DOES have an outlier.
the data item that occurs the most times. It is possible for a
set of data to have no mode, one mode, or more than one mode.
Use the mode when the data are nonnumeric or when choosing the most popular item.
a data value that is much higher or lower than the other data values in the set.
the difference between the greatest and the least data value.
The range gives you a measure of the spread of data.

2. Stem-And-Leaf Plot:
Create a stem-and-leaf plot for the following set of data, and then answer the questions below.
1. What is the lowest data value
(or lower extreme)?
2. What is the highest data value (or upper extreme)?
3. What is the range of the data?
4. What is the median of the data?
5. What is the mode of the data?

3. A double stem-and-leaf plot can display two sets of data at once
A double stem-and-leaf plot can display two sets of data at once. The stem is between the two bars, and the leaves are on each side. Leaves are in increasing order from the stem. Use the following stem-and-leaf plot to answer the questions below.
New Car Mileage (mi/gal)
City Highway
9 1
4 1
means 20 mi/gal means 27 mi/gal
6. Find the mean of the city mileage and highway mileage for nine new cars.
7. Find the median of the city mileage and of the highway mileage.
8. Find the mode(s) of the city mileage and of the highway mileage.
9. Find the range of the city mileage and of the highway mileage.