Mathematics Statistics: How to find the mean of a set of numbers from a table - Part 6 by ghostgtr

mathematics · @ghostgtr · Oct 9 '17

$17.12

Mathematics Statistics: How to find the mean of a set of numbers from a table - Part 6

<center>http://www.montageafrica.com/wp-content/uploads/2017/01/maxresdefault-550x300.jpg</center>
<center>[Source](http://www.montageafrica.com/wp-content/uploads/2017/01/maxresdefault-550x300.jpg)</center>

<center>https://imgoat.com/uploads/9d4f495e87/45370.PNG</center>
# <center>At first, it looks scary doesn't it?</center>
 <center>It looks like some sort of formula that only mathematicians will be able to understand but I am going to show you how easy it can really be:</center>

# Look at the following example:
### Find the mean of the data represented in the table below:
<center>https://imgoat.com/uploads/9d4f495e87/45371.PNG</center>
It's actually quite easy to solve it as you can see below:
<center>https://imgoat.com/uploads/9d4f495e87/45376.PNG</center>
First: You multiply each top box with each bottom box and then add them all together.
Second: You add each bottom box together below the line.
Third: You do the division to find an answer.
Fourth: You're done!!!

<center>https://imgoat.com/uploads/9d4f495e87/45377.PNG</center>

# Now try the next one which will make more sense to you:
### The following table shows the pocket money earned per week for 26 children.  Find the mean pocket money earned.
<center>https://imgoat.com/uploads/9d4f495e87/45378.PNG</center>

# Solution?
I bet you can see how that weird and awful looking formula works now, don't you?
<center>https://imgoat.com/uploads/9d4f495e87/45380.PNG</center>
<center>https://imgoat.com/uploads/9d4f495e87/45372.PNG</center>

<center>https://media.tenor.com/images/5cd447ac4e7ba91eb82f6e5482539cb2/tenor.gif</center>
<center>[Source](https://media.tenor.com/images/5cd447ac4e7ba91eb82f6e5482539cb2/tenor.gif)</center>

#### In Part 7, I will explain how to read a line plot.
Part 1: https://steemit.com/mathematics/@ghostgtr/mathematics-statistics-application-on-cumulative-frequency-part-1
Part 2: https://steemit.com/mathematics/@ghostgtr/mathematics-statistics-application-on-mean-part-2
Part 3: https://steemit.com/mathematics/@ghostgtr/mathematics-statistics-construct-the-relative-frequency-table-of-a-set-of-numbers-part-3
Part 4: https://steemit.com/mathematics/@ghostgtr/mathematics-statistics-how-to-draw-a-histogram-part-4
Part 5: https://steemit.com/mathematics/@ghostgtr/mathematics-statistics-finding-the-interquartile-range-of-a-set-of-ungrouped-unordered-data-part-5

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