We're BA-ACK!

 

And this time, with a whole new topic:

 

DATA MANAGEMENT AND GRAPHING

 

One thing that will make data management and graphing a lot easier is knowing how to find the mean, the median, and of course the mode. For these demonstration purposes, we will use the following set of numbers: 4, 9, 2, 6, 5, 11

 

BEFORE WE BEGIN!

The first step, before we calculate the mean, the median, or the mode, is to put our numbers in ascending numerical order.

It should look like this when complete: 2, 4, 5, 6, 9, 11.

*Ahem* That out of the way, MOVING ON!

 

TO FIND THE MEAN:

Another way of saying "finding the mean" is "finding the average". That's what you're doing here.

What you need to do is add up all the numbers, and then divide by how many numbers are in the set.

 

 [e.g.] 2+4+5+6+9+11 = 37

37 / 6 = 6.16

The mean is 6.16.

 

TO FIND THE MEDIAN:

The median is just the number in the middle of your set. However, in this case, there are two numbers in the middle. This is what to do when that happens.

Your numbers are already in ascending numerical order, so all you have to do is add the two numbers together and divide by two.

 

 

[e.g.] 5+6 = 11

 

11 / 2 = 5.5

 

TO FIND THE MODE:

The mode is the number that appears the most in a set of data.

 

[e.g.] 3, 7, 9, 9, 9, 13, 21

The mode is obviously 9 because it appears the most in the data.

 

 

 

 

 

 

GRAPHING

 

An essential part of organizing your data is graphing.

 

First, find some data to graph, let's say...hours of T.V. watched over the course of a week.

 

Day 1: 2 hrs.

 

Day 2: 4 hrs.

 

Day 3: 2.5 hrs.

 

Day 4: 3 hrs.

 

Day 5: 7 hrs.

 

Day 6: 5.5 hrs.

 

Day 7: 4 hrs.

 

That can be difficult to organize. With the magic of GRAPHS  you can enjoy neat, organized...well...just about anything right there for reference!

So let's try making graphs!

 

 

THE BAR GRAPH

 

Yes...the wonders of a bar graph. A bar graph can be colour coded, isn't that fab? Check out the diagrams below.

 

 

 

 Almost every graph has an X axis and Y axis.

 

 

 

 The axis's must have titles so you know what you're graphing.

 

 

 

 

 

 

 

 

 You can easily reverse your graph. Now you put the information into your graph like so. I only used the numbers I absolutely needed, because I'm lazy.

 

 

 

 

 

 

 

 This is our fantastic finished graph with all data inputted. Here it is!