Is the distribution approximately Normal?

You will work on a lab today in class, but part of what you will need to do is justify whether or not the distribution is approximately Normal or not.

Some things to think about.

How does your data fit the 68-95-99.7 rule?

What is a normal probability plot?  How can that help?

Here are your instructions for tonight...


You should have completed your data collection.  If you did not, then you will need to proceed with your data set (it should be fine).

Using your data set, complete #2 on the lab worksheet.

To answer #3 see the above questions to guide your work.

For #4 Use this google doc which was shared with you via email.  Enter your data at the bottom of the list in column A.  I started it off with two entries (I did the trials in my office, so they are not fake entries).  In columns C and D you will see a summary table of the data.  This will be updated real time as you enter your data.  Use this for your histogram for number 4.  (Note: not everyone will have the same totals unless we all wait for the last person to enter his/her info.  As long as there is at least 140 trials you may procede with your histogram.  It may be interesting to see the differences, Also since you and your partner have the same data please record in column B your name and your parnter's name, so that your partner knows he or she doesn't need to enter the data).

Continue with the rest of the worksheet.

Text me using the number to the right if you have questions.

Mr. Babel