Austin's Measures of Central Tendency

Sunday, September 28, 2008
• arrange the data in ascending order
• the sum of data divided by how many numbers there are in the data
• with an outlier the mean is less accurate (average)
1 2 3 4 5
1+2+3+4+5=15
15 divided by 5 equals 3
3 is the mean

• arrange the data in ascending order
• the middle number in a set of data
• if there are 2 middle numbers you find the mean of them
• great to use when there is an outlier
1 2 3 4 5
1 5
2 4
3
3 is the median

Mode

• arrange the data in ascending order
• the most frequently used number in the data
• the data that appears the most
• you can have more than one mode
• you can have no mode

1 2 3 3 4

3 appears the most

3 is the mode

• arrange the data in ascending order
• subtract the smallest data from the largest data
• large range = outlier
1 2 3 4 5
5 is the largest number
1 is the smallest number
5-1=4
4 is the range

This is a video that I found on youtube that had to do with mean, median, and mode.