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Transcript
I
can identify the shape of a data
distribution using statistics or charts.
I
can make inferences about the
population from the shape of a sample.
 You
have 4 minutes to roll a pair of dice
as many times as possible. Make sure to
keep track of the sums that you roll!
Mean: the average of a set of data
Add all of the values up and divide by the
total number
Standard Deviation: A measure of variation
from the mean
Remember,
is the mean.
Spread of a data set: The “width” of a data
set
 Range
 Quartiles
 Interquartile Range
Graphing data on a Histogram
• The Independent Variable (what you are
changing) goes on the x-axis
• The Dependent Variable (the result of your
experiment) goes on the y-axis
 Use
 One
your personal data to create a graph
at a time, come to the computer and
enter your data into the spreadsheet
9
8
7
6
5
4
3
2
1
0
2
3
4
5
6
7
8
9
10
11
12
 What
does it look like?
 Why is it called a bell curve?
 What does “normal” mean?
 What makes a set of data “normal”?
7
6
5
4
3
2
1
0
2
3
4
5
6
7
8
9
10
11
12
 What
does it look like?
 Why is it called a bell curve?
 What does “normal” mean?
 What makes a set of data “normal”?
Is your data normally distributed?
Mean = 490
Standard
Deviation = 100
 Is
the data normally distributed?
 Does
the sample size have an effect on
the normality of the data?
I
can identify the shape of a data
distribution using statistics or charts.
I
can make inferences about the
population from the shape of a sample.
Value on the Dice
Probabilit
y
2
1/36
3
2/36
4
3/36
5
4/36
6
5/36
7
6/36
8
5/36
9
4/36
10
3/36
11
2/36
12
1/36