Measures of Central Tendency

Measures of Central Tendency-a value that represents the centre of a data set.
(it can be the mean, median, or mode)

Data set- is a group of numbers that you must arrange in order from least to greatest.
example: data set: 2, 36, 8, 4, 7, 9, 5 = 2, 4, 5, 7, 8, 9, 36.

Median- is the middle number in a set of data after the data have been arranged in order.
example:









Mode- the most frequently occurring number in a set of data
(mode and 'most' both have 4 letters)
examples: 1) 2, 3, 4, 4, 4, 7, 7, 9. The mode is: 4
2) 1, 3, 6, 9, 10. The mode is: NO MODE.

Mean- a measure of central tendency the sum of a set of values divided by the number of values in a set.
example: 3, 4, 6, 8, 9
3+4+6+8+9=30
30 divided by 5=6
1) arrange the numbers in order.
2) find the sum of the data set.
3) divide it by how much numbers there are in that data set.
Range- the positive difference between the largest and smallest values in a data set.
example:






Outlier- a value that is much larger or smaller, than the other data value.
(the data set may have 1 or more outlier or zero outliers).
example: 1, 4, 6, 7, 8, 9, 34 = outlier: 34

Heres a question for you to try!
18, 19, 79, 17, 20, 19, 12, 19.
find the mean, median, range, and outliers.





Here's a video that you guys would enjoy:

p.s: try to memorize it for the test :P

Here's also a very fun game you can play! Have fun :)!


*Don't forget to do your homework booklet! ALL PAGES.*
Due Monday, June 11.

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