did you just say, Marie?"
"What?" she asked, confused by Mike's question.
said something about a heap of
data," continued Mike.
SAID we sorted through mounds of data," replied Marie.
"Yes, that's it!
Marie, I think there's more to learn about all
"What do you mean
"Come with me and I'll show you," Mike pleaded.
"Oh no! Here we go again!" moaned Marie. |
"Here, look at this graph."
"Yeah, so, it's the column bar graph you made
from the "All That Data!" survey results.
"I know that! But look at the shape
of the data. Doesn't it remind you of something?"
Type in how you think Marie will describe the shape of
"Well, I think there may be a pattern
in all that data!" continued Mike.
"Well, we were, but...
I just thought of something else.
Something that calls for two
duo of Mike and Marie!" |
Describe the shape of the girls' data.
"Okay, here's my graph. Now show me yours!" said Marie.
"Well, the boys' graph looks more like a mountain range! Look at all
those peaks and valleys!" commented Mike. |
and lowest extremes? Does that mean the highest peaks and lowest valleys?"
"The lowest and highest extremes are the beginning and ending points of
Look at this picture. To reach the top, we start climbing at the lowest
"When we come off
the mountain, we are at the highest extreme.
It is called the highest extreme because it's the highest value
in the range of data". |
""Look! When I
put this magnifying glass over my graph, the range appears!
The lowest extreme is
The highest extreme
"Three Measures of Central Tendency:
Mean, Median, Mode."
"These terms are used to describe where the CENTER of the
data TENDS to fall."
at the girls' graph with this one," suggested Marie.
"Look, I found that the mean was $0.81
median was $0.80."
Check the mode
of the data.
$0.75 $0.80 $0.85
third magnifying glass is used to examine how the data is distributed, or shared, within the
range," Mike continued.
"It says that when data is evenly
shared around the center, it is called a normal
So, I guess it means that girls are NORMAL!"
"That's right! The girls' graph was normal, and the boys' graph was
Now we have mathematical proof that girls are normal and boys are not!
hardly call that logic mathematical !
Now, let's get back to work!"
"Oh, alright!" consented Marie. "Does the dictionary say anything
look carefully at the data in order to detect:
of the data,
OF CENTRAL TENDENCY, and
of the data."
"Through careful inspection, they gather enough information to describe
the data for others!" Mike concluded.
"Our Data Detective Kit is now
complete, and I'm ready for our first case!" declared Mike.
"Let's look at the "All That Data!" survey results. I know there's a mystery hidden in that mound
Review the case (bar
graph) that Mike and Marie will try to solve!
What "clues" do you see in the areas of range, central tendency, and