Week #1 - Assignments due on Friday, January 15, 2010 - no exceptions.

Download the course syllabus HERE!

Please have a parent or guardian sign the syllabus and hand it in by Friday.

Read pp. xxv-xxxi – this will introduce you to statistics and your textbook.

Design a one question survey that you will ask of 100 different Denver Lutheran students.

Example:           “What is you favorite color?”

or “How many times a day do you think about the Packers?”

Your question needs to be approved by the instructor (just come and ask him) by Friday, January 15

You need to be done doing gathering results of your survey by Friday, January 22 (you should probably get started this week) – please record the names of the students you asked (have them give a signature).

Homework #1

Read p. 4-7.

               Do #’s 1.1,1.2, 1.3, and 1.4

Read p. 8-14

               Do #’s 1.5, 1.6, 1.7, and 1.8

               Do # 1.5 again with a class width of 2.

Pay special attention to the definitions of “skewed” histograms on p. 12.

To do a histogram on your calculator:

STAT, ClrList will take you to a screen that says “ClrList”, enter L1(2nd 1) , L2 (2nd 2) then hit ENTER

This clears the data lists.

STAT, EDIT and then enter all your pieces of data in L1.

You need to tell the calculator that you want to do a statistical graph, so . . .

STAT PLOT (2nd Y=), then ENTER

Turn Plot1 On, then change Type to histogram (the one with the bars)

ZOOM, 9 (ZoomStat) will graph the histogram with a class width of 1.

To change the class width, hit WINDOW and change Xscl to the desired class width.

Week #2 - Assignments due on Friday, January 22, 2010 - no exceptions

Homework #2

Read p. 15-18 

              Do #'s 1.9, 1.10, 1.18, and 1.19

Homework #3

Read p. 28-36

              Do #’s 1.27, 1.28, 1.29, 1.30, 1.31, and 1.32

Finding mean, median, and quartiles on your calculator:

Enter all your data in L1.

STAT, CALC, 1-Var Stats, ENTER

The first piece of information listed is the mean.

Pushing the down arrow will reveal the five-number summary (min, Q1, Med, Q3, and max)

Graphing a boxplot on your calculator:

2nd Y=    to go to the STAT PLOT menu.

Change Plot1 to boxplot.

ZOOM, 9 to show the boxplot, use WINDOW to change the dimensions of the viewing screen if necessary.  Use TRACE  and arrow keys to view the five number summary on the boxplot.

Week # 3 - Assignments due on Friday, January 29, 2010 - no exceptions

Survey Project

Take the results of your one-question survey and display your results using two different displays (for example, use a pie-chart and a bar graph) of your choice.

Each display should take up one sheet of clean white paper.  The display should be organized, professional-looking, and make use of color.  If you have the knowledge to do the displays on your computer, feel free to do so.

Both displays and your data collection (names) will be due on Friday, January 29, 2010.

Homework #4

Read p. 37-41 – pay special attention to the paragraph on “degrees of freedom.”  We will want to use degrees of freedom of (n-1) as well.  This standard deviation is represented by Sx on your calculator.  Do not use the , as that is degrees of freedom of (n).

You can calculate mean and standard deviation using the same key sequence as you did to find median and quartiles (see above).

Do #’s 1.34 (no calculator – make sure and look at example 1.10), and 1.35 (calculator)

Read the summary on p. 41-42.

Do p. 42-45 #’s 1.39, 1.41, 1.46, 1.47, 1,48, 1,49

Some things to remember about standard deviation: 

1. It measures the spread around the mean.
2. It should only be used with the mean, never with the median.
3. If s=0, then all the observations must be the same number (no spread).
4. The larger s is, the more spread out the data is.
5. It can be strongly influenced by outliers.  It is best to use standard deviation and the mean if the distribution is symmetric or roughly symmetric.  Like the mean, the standard deviation is “not resistant.”

 General rules for choosing a summary:

1. For a symmetric or roughly symmetric distribution – use the mean and standard deviation.
2. For a skewed distribution or one with outliers – use a 5-number summary.

Homework #5

Read pp. 46 – 55.  Have a thorough understanding of what the 68-95-99.7 rule means.

Do #’s 1.53, 1.54, and 1.55.  Then go to p. 64 and do #’s 1.62 and 1.63.

Important symbols:

              = the mean of the actual set of data

              = the standard deviation of the actual set of data

               = the standard deviation of the density curve (sigma)

              = the mean of the density curve (mu)

Week # 5 - Assignments due on Friday, February 5, 2010 - no exceptions

Homework #6

The three main concepts that need to be grasped are:

1. How to convert information into a z-score.
2. How to read Table A.
3. How to use a z-score and Table A to answer questions.

Read pp. 55 – 62. 

Do 1.56, 1.57, 1.58, 1.59, and 1.60.  Then go to p. 65 and do 1.65 and 1.66.  Then go to p. 76 and do 1.89.

Table A is found in your textbook, as an insert or in the back of the book.

Table A ONLY GIVES PROBABILITIES TO THE LEFT OF THE Z-SCORE!!

Note:  This is the most difficult section of Unit 1.  Please seek out the instructor for extra help if needed.

Download Unit 1 Test HERE - Test is due Tuesday, February 9, 2010