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mean,median and mode

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Find the mean, median, and mode(s) of the data set.

55, 60, 65, 65, 75, 80, 85, 90, 100

asked Oct 31, 2013 in ALGEBRA 2 by chrisgirl Apprentice

1 Answer

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Given set of numbers 55, 60, 65, 65, 75, 80, 85, 90, 100

First Mean

Formula for mean is ( Sum of numbers/total numbers ) = a+b/2

= 55+60+65+65+75+80+85+90+100/ 9         (Add numaretor)

= 675/9

= 75

The Mean of given set is 75.

Now Median

Formula for Median is Middle number.

In case if there is two middle numbers then we have to do,               Sum of two numbers /2

= 55, 60, 65, 65, 75, 80, 85, 90, 100

here only 9 numbers ,then the middle number is 75

The Median of given set is 75

Now Mode

Mode is nothing but a number which is repeted times   in given set.

given set is 55, 60, 65, 65, 75, 80, 85, 90, 100

In this set 65 is comes two times and all other numbers are comes only one time.

Then the mode of given set is 65.

answered Nov 1, 2013 by steve Scholar

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