The Normal Distribution

Learning Targets 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.

Roll Your Dice! 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!

A Blast from Our PastMean: the average of a set of data

Add all of the values up and divide by the total number

A Blast from Our PastStandard Deviation: A measure of

variation from the mean

Remember, is the mean.

A Blast from Our PastSpread of a data set: The “width” of a

data set Range Quartiles Interquartile Range

A Blast from Our PastGraphing 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

Graphing Time! Use your personal data to create a

graph

One at a time, come to the computer and enter your data into the spreadsheet

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The Normal Distribution What does it look like? Why is it called a bell curve? What does “normal” mean? What makes a set of data “normal”?

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The Normal Distribution What does it look like? Why is it called a bell curve? What does “normal” mean? What makes a set of data “normal”?

Your DataIs your data normally distributed?

Empirical RuleMean = 490

StandardDeviation = 100

The Class Data Is the data normally distributed?

Does the sample size have an effect on the normality of the data?

Learning Targets 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.

Next Lesson:Value on the Dice

Probability

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