Wednesday, January 14, 2009
Scribepost for January 14 2009
In the previous days Mr. Isfeld has taught us about the Measures Of Central Tendencies. There are Median Mode and Mean.
Mean-is the sum of a set of values divided by the number of values i the set.
Eg. 1,2,3,4,5 first add all the numbers and it all equals 15 then count how many numbers there are and then you divide it. 15÷5=3 that is the mean.
Mode- is the most frequently occuring number in a set of data.
Eg. The mode in 3,5,7,7 and 9 is 7.Modes of 2,2,4,6,6,8 and 11 are 2 and 6.The data 1,3,4, and 5 has no mode.
Median- is the middle number in a set of data after the data has been arranged in order.Eg. The median of 2,5,6,8 and 9 is 6.If there are two numbers in the middle you just add it and you divide it by 2.
Eg. The median of 1,3,6,8,9 and 10 is 7.6+8+1414÷2=7therfor the median is 7.
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