CENTRAL TENDENCY IN MATH- noelia 7-iv

MEASURES OF CENTRAL TENDENCY

 

What are the measures of central tendency?
A measure of central tendency is a measure that tells us where the middle of a bunch of data lies.The three most common measures of central tendency are the mean, the median, and the mode. 

WHAT IS THE MEAN: 
 Mean is the most common measure of central tendency. It is simply the sum of the numbers divided by the number of numbers in a set of data. This is also known as average.

WHAT IS THE MEDIAN: 
 Median is the number present in the middle when the numbers in a set of data are arranged in ascending or descending order. If the number of numbers in a data set is even, then the median is the mean of the two middle numbers.

WHAT IS THE MODE:
 Mode is the value that occurs most frequently in a set of data. 

EXAMPLES OF CENTRAL TENDENCY:
For the data 1, 2, 3, 4, 5, 5, 6, 7, 8 the measures of central tendency are 

Mean = 1+2+3+4+5+6+7+8      41
          -------------------------- = ----- = 4.56
                        9                     9

Median = 5


Mode = 5