HELP WITH AVERAGES

  • 0 votes

HOW WOULD YOU WORK OUT THE AVERAGE RESULT OF A TABLE OF DATA ??

Posted Wed 1st June, 2011 @ 11:49 by getrevising

6 Answers

  • 3 votes

You have 4 different averages. Mean, median, mode and range. 

Here is a set of data:

Some children were asked what their favourite pet was:

Dog:9

Cat:7

Fish:  2

Rabbit: 2

The mode of this data is dog. This is because more children choose dog than every other animal.

Median is when you put them in order what is the middle number:

2 2 7 9 

Ok so now we have to take 2 and 7 and add them up to get 9. Now divide 9 by two as you have 2 numbers to get 4.5 so the median for this set of data is 4.5.

Now for mean. For this average you have to add up all the data to make 20. Next you divide this by the number of items. In this case there is 4. So 20/4=5. This makes the mean 5.

Finally there is range. This is the smallest number in the data in this case 2 taken away from the biggest number which is 9. 9-2=7. Therefore our range is 7. 

Just remember 

  • Mode: the popular number. If a item of clothing is popular than it is in mode.
  • Median: The middle number.
  • Mean: The average that will take the most working out. Known as the common average. 
  • Range. Take away small from big. 

Hope this helps. 

Answered Thu 2nd June, 2011 @ 13:11 by Kelly Davies
  • 1 vote

1) Add all the results up to make a single number.

2) Divide that number by the number of results taken.

Answered Wed 1st June, 2011 @ 11:50 by Al
  • 1 vote

Say the Question was What is the mean number of films watched by the people?

Person    No. of Films Watched

a                  3

b                  4

c                   9

d                  6

You would do (3+4+9+6)/4

22/4 = 5.5

Mean = 5.5 Films

Hope this is what you mean :)

Answered Wed 1st June, 2011 @ 21:28 by Steven
  • 0 votes

it would depend on if they are asking for the mean, median or mode

Answered Wed 1st June, 2011 @ 19:21 by Pui Pui
  • 0 votes

ive got a revision card on this if that's going to help you at all :) x

Answered Wed 1st June, 2011 @ 21:59 by Kelly:)
  • 0 votes

the range is not an average. that is a common mistake

Answered Thu 2nd June, 2011 @ 19:23 by Pui Pui