1. Ashley Johnson LTEC 4100 Section 6 February 4th 2009
STATISTICS
Ashley Johnson
LTEC 4100 Section 6
February 4th 2009

2. UNIT QUESTION What is the definition of Mean
What is the definition of Median
What is the definition of Mode

3. ESSENTIAL QUESTION
Can you determine which “M” to use in different situations?

4. MEAN The mean is the average of a group of numbers.
The mean of the numbers: 1, 4, 2, and 5 is 3
First step: add all of the numbers =12
Second step: divide the total by the amount of numbers (4). 12/4=3

5. MEDIAN The median is the middle number of a group of numbers
The median of the numbers: 1, 3, 5, 7 and 9 is 5.
If there is an even amount of numbers: 2, 4, 6 and 8, you add the two middle numbers and divide by 2. The median: 4+6=10, divided by 2 is 5.

6. MODE
The mode is the number that occurs the most in a group of numbers.
The mode of the numbers:1, 1, 2, 1, 2, 2, 3, 1 is 1. There are four 1’s, three 2’s and one 3. There are more 1’s than any other number.

7. FROM THE TEKS (7.12) Probability and statistics.
The student is expected to:
Describe a set of data using mean, median, mode.
Choose among mean, median, mode to describe a set of data and justify the choice for a particular situation.

8. REFERENCES
ritter.tea.state.tx.us (TEKS website)