1. Decimal Applications : Mean, Median, and Mode
Section 5.7
Decimal Applications :
Mean, Median, and Mode

2. Central Tendency
A measure of central tendency is a measure that tells us where the middle of a bunch of data lies.
The three types of central tendency are:
Mean
Median
Mode

3. Mean
The mean (average) of a set of numbered items is the sum of the items divided by the number of items.

4. Example
Find the mean
15, 23, 24, 18, 25

5. Example
Find the mean
0.5, 0.2, 0.2, 0.6, 0.3, 1.3, 0.8, 0.1, 0.5

6. Median
The median of a set of number in numerical order is the middle number.
If the number of items is odd, the median is the middle number
If the number of items is even, the median is the mean of the two middle numbers.

7. Example
Find the median
15, 23, 24, 18, 25

8. Example
Find the median
0.5, 0.2, 0.2, 0.6, 0.3, 1.3, 0.8, 0.1, 0.5

9. Mode
The mode is a set of number is the number or numbers that occurs most often.
It is possible for a set of number to have more than one mode or to have no mode.

10. Example
Find the mode
15, 23, 24, 18, 25

11. Example
Find the mode
0.5, 0.2, 0.2, 0.6, 0.3, 1.3, 0.8, 0.1, 0.5

12. Example
In a mathematics class, the following test scores were recorded for a student.
93, 85, 89, 79, 88, 91
Find the mean, median, and mode.

13. Example
In a mathematics class, the following test scores were recorded for a student.
76, 86, 54, 90, 78, 62, 59, 86, 92, 51
Find the mean, median, and mode.

14. Example
Below are the grades for a student for a particular semester. Use the other table to find the grade point average (mean).

15. Example
Below are the grades for a student for a particular semester. Use the other table to find the grade point average