we do with the data?
- When we have data collected we
usually want to present it to others in a quick and easy-to-see
form. What are you going to do with yours?
- Maybe you would like to make a
pie chart that shows the total percentages of herbivores, omnivores,
and piscivores recorded on your data sheet. Here's what to do:
- 1. If you haven't already totaled
the 4th column on your data sheet, do so now. You need to add
together all percentages in column four that have an "H"
in column three. Write that number down and then repeat for "O"
- 2. Now you should have three numbers
that equal 100% when added together. If not, redo all of your
mathematical calculations...including the computation of column
four percentages from column two totals (see instructions at
bottom of data sheet).
- 3. Use a protractor to help you
draw a circle on a clean sheet of paper. How many degrees are
in a complete circle? I hope that you said 360!
- 4. On a separate sheet of paper
multiply each of your three percentages by 360 degrees. This
will give you the number of degrees that each diet type should
occupy in the pie graph.
- example: H = 25%, O = 35%, P =
40% (25%= .25, 35%= .35, 40%= .40)
- .25 x 360 degrees = 90 degrees
- .35 x 360 degrees = 126 degrees
- .40 x 360 degrees = 144
- 5. Now use the protractor to measure
out the three sections of your pie graph according to the degrees
calculated in step 4.
- 6. Be sure to label each section
neatly and give your chart an appropriate title.
the values given in these example graphs are NOT real! They are
only to illustrate how to make the graphs. You will have to determine
the real results yourself!
- Instead of using a pie chart,
you might decide to share your data using a bar graph.
You could choose to graph the percentages of the three diet types
(see the first example below), or you could graph the numbers
or percentages by species (see the second example below). Be
sure to be neat, give your graph a title, and label both axies.
Here is an example of a bar graph.
- Perhaps you are comparing data
from two different locations or fish counts, such as a freshwater
lake compared to the coral reef. If you are comparing the data
from two different locations or fish counts, you might use a
split bar graph, such as the example below.
- Whatever means you use to summarize
and illustrate your results, just remember that science is not
useful unless we communicate our findings to others. Be sure
to share what you have found.