-is a value that represents the center of a set of data
-can be median, mode, mean
Remember:
-When given a set of data always reorder the digits from least to greatest.
Median
-the middle number in a set of data after the data has been arranged or ordered, only if there is an odd number of items in the data
-if there is an even number of items in the data the sum of the 2 middle numbers in the data set are divided to get the total
eg. 2, 5, 6, 8, 9, -median is 6
1, 3, 6, 8, 9, 10 -median is 7
-----(6+8) ÷ 2 =7
3, 8, 2, 6, 5, 4, -median is 4.5
2, 3, 4, 5, 6, 8,
----(4+5) ÷ 2 = 4.5
Mode
-the most frequent occurring number in the set of data
-if you find no number that repeats most often, then there is no mode.
eg. 3, 5, 7, 7, 9 -mode is 7
2, 2, 4, 6, 6, 8, 11 -mode is 2 and 6
1, 2, 3, 4 -mode; there is no mode
Try this:
Montreal scored the following goals in their last 10 games
5, 4, 3, 2, 1, 5, 3, 3, 7, 3
-Find the median and the mode:
1, 2, 3, 3, 3, 3, 4, 5, 5, 7
----------(3+3) ÷ 2 = 3
median- 3
mode- 3
Frequency Table
8, 8, 8, 10, 10, 11, 11, 11, 14, 14
----------(10+11) ÷ 2 = 10.5
median- 10.5
mode- 8, 11
Mean
-a measure of rental tendency
-the sum (adding) of a set of data divided by the number of values in set
eg. 4, 5, 8, 9, 9
- 4+5+8+9+9=35
- 35 ÷ 5 =7
Try this- mean, median, mode
a) 4, 5, 6, 7, 7, 8, 8, 9, 9
mean-7, median-7, mode-7
b) 250, 250 300, 300, 400
mean-300, median-300, mode-250, 300
