Finding the Standard Deviation

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Presentation transcript:

Finding the Standard Deviation 8.26.2013 Finding the Standard Deviation

Do Now Name one career that you think might use statistics (collecting and analyzing data). Get out your worksheet from Friday.

Objective I can use standard deviation to describe a data set. Agenda Do Now – Statistic Careers (10) class Standard Deviation Activity (30) groups Homework Help (10) individual Closure/Exit Ticket (10) class/individual

Class Problem A recent article says that teenagers send an average of 100 text messages per day. If I collected data from 6 teenagers, what could the possible data set look like to get this average?

A large standard deviation occurs when ________________________. Turn and Talk A large standard deviation occurs when ________________________. A small standard deviation occurs when ___________________________. Answer: A large standard deviation occurs when the data is very spread out. A small standard deviation occurs when the data is all close together.

What measures of center or spread do outliers have a large effect on? Lets Think About This: What measures of center or spread do outliers have a large effect on? Answer: Mean, Standard Deviation, Range

Exit Ticket Will the following data have a large standard deviation or low standard deviation? Why? 3, 24, 39, 42, 45, 46, 67, 68, 79, 88