*** JOBS JOBS JOBS ***
Come work for the Acme
Bicycle Company. Our average
rate of pay is $10 per hour!
"How can this
be!?" said Jenny. She was very angry. The advertisement said that the average rate of
pay is $10/hour.
She went to see the owner.
The Acme Bicycle Company has 10 employees. 9 of them make $1/hour, and
1 of them makes $91/hour.
Recall: the average is computed by (1) adding up all of the values, and (2) dividing by
the number of values.
an average can be deceptive. That's why there are other ways to describe data. Today we
are going to look at the...
The mode is the value that shows up the most often in the data.
What is the mode pay rate at the Acme Bicycle Company?
35°, 35°, 36°, 33°, 31°, 34°, 33°, 35°, 33°, 42°, 34°
What is the mode temperature on this list?
6, 0, 1, 1, 4, 6,
5, 1, 7, 7, 7,8, 1, 0, 1
Yes, figuring out the mode isn't too difficult, huh? It's easy to remember what the
mode is, because "mode" sounds a lot like "most".
DID YOU KNOW?
Did you that "data" is a plural noun? You should say
"These are the data" or "The data look fine" and not "This
is the data" or "The data looks fine".
The singular form of "data" is "datum". If your list has only one
value, you can refer to it as a datum. Otherwise, it is data. Pretty weird, huh?
What about this?
Look at this list of data: 4, 7, 8, 10, 15, 16. No value appears more than once. What
do you think the mode is? Click one below:
Here's something else that can
happen. Look at these data:
10, 10, 10, 11, 14, 15, 20, 20, 20.
In this case, we have TWO numbers that show up the most, so this list of data has TWO
The MODE is the number or numbers which show up the
If every number appears once, then there is NO MODE
If more than one number appears the most, then there are MORE THAN ONE MODE.