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- What do you see here
are two different ways
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of looking at the same information.
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So, for example, if I were to ask you,
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and you could look at either
this graph on the left
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or this graph on the right,
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what type of squirrel do they find
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the most of at the park?
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What would your answer be?
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Well, the way that you
would try to answer that,
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let's say you were to look
at this graph on the left,
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which is a picture graph.
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You might say, "Where
does that name come from?"
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Well, it's using pictures.
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And these pictures usually
are some type of symbol,
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or in this case, an actual
picture of a squirrel
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that shows you the things
that we're counting.
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Now, before you even just
count the picture graph,
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the pictures in the picture graph,
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it's important to look at the key here
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and make sure that you know
what each squirrel picture.
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They almost look like cats here.
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What each of these squirrel
pictures represent here,
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each squirrel represents one squirrel,
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so it's pretty straightforward,
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but it could have been two
squirrels or three squirrels,
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or four and a half squirrels,
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which would've been very strange,
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but it's one squirrel.
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So if you wanted to know
which one has the most,
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and I guess it would've been the most,
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regardless of what this key said,
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even if it was two squirrels,
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you can see just by looking at it
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that you see the most gray squirrels here.
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There's the most number of
these little squirrel pictures.
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We can actually know exactly
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how many gray squirrels there are.
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There are 1, 2, 3, 4, 5, 6, 7, 8
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of these pictures.
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Each of them represent one squirrel,
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so there are eight gray squirrels.
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Now, we could have also used
this graph at the right,
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and this is called a bar graph.
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Why?
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Because you have these
bars to show how much
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of each type of squirrel you have,
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and so we can make sure we can confirm
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that the gray squirrels right over here.
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This is also showing that you have eight,
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and with a bar graph, this
one has it nicely numbered,
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where we see that each
line increases by one.
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We go from 1, 2, 3, 4, 5, 6, 7, 8, 9.
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Sometimes it's not labeled as neatly,
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and sometimes each of these vertical lines
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might represent two or three or four.
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So it's always good to make sure,
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but this one's pretty straightforward.
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So we can see here there
are eight gray squirrels.
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Now these can also be useful
for making comparisons.
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So, for example, if I were to say
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how many more fox squirrels were found
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at the park than red squirrels?
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Well, you could look at either of these.
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Let's start with the bar graph here.
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We could see the red squirrels.
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There's five.
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The fox squirrels has six,
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so there's one more.
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There's one more fox
squirrel than red squirrel.
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You can see that here.
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The red squirrel fives, fox squirrel.
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The red (chuckles)
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There are five red squirrels,
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and then you can see there
are six fox squirrels.
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You could think of this one
as the one that goes above
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and beyond the number of
red squirrels we have.
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So both picture and bar graphs
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can be good ways of thinking
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of the quantities.
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You see, they're good
for making comparisons.
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They're good for figuring
out just how many
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of something you see or
what's the difference,
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or even the total of different categories.
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Here, it's the squirrel types.
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Now, it's also important to realize
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what this is not going to tell you.
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This isn't necessarily going
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to even tell you the
color of the squirrels.
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You might say, "Oh
look, this picture graph
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looks like this squirrel.
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Is this gray/blue color?"
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No, you can't just assume
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how it's drawn is actually what it is.
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It's just a symbol.
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For example, I'm guessing
that a red squirrel
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is more reddish, and a gray squirrel,
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and maybe a gray squirrel is more grayish.
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But this doesn't tell
you what they look like.
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This doesn't tell you how hard
it was to collect the data.
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You don't know how long it took.
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You don't know anything else
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about the squirrel's behavior,
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what they might eat, et cetera.
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You just know how many of each type
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of squirrel was found at the park.