Psychology 216-02:
Elementary Statistics

 Links Syllabus Calculator Comment Box Data Set Mentor Questionnaire Quizzes SPSS Tutorials RVLS Activities Tables Unit normal t F q Binomial χ2

Conditions
in Dayton:
28° F / -2° C
Light Freezing Drizzle Fog/Mist

 Time UntilExam 4*:

Have a Great Summer!:
5/4/06

I hope that each of you has a wonderful summer break.

5/4/06

Grades are available from the link on the left.  After adding a generous number of points to the final exam (they are already added to your grade that appears in the online grade book), the mean of the final was 77.8 with a standard deviation of 12.5.  The range was 101 - 56 = 45 (WOW!).  The following histogram shows the frequency of each letter grade for the exam and for the class:

There were 640 points in the class.  The syllabus lists the number of points required for each letter grade.

Clustered Bar Charts in SPSS 12.0:
4/21/06

To get the clustered bar chart in SPSS, do the following:
Click on Graphs | Bar
Click on Clustered | Define
In the Bars Represent section of the dialog box, select Other summary function
Move the DV (points) into the Variable box
Move one of the IVs (e.g. high vs low GPA) into the Category Axis box
Move the other IV (e.g. Class condition) into the Define Cluster By box
Click OK!

Exam 4 Is Wednesday, 5/3 at 2:30 PM:
4/20/06

Exam 4 is Wednesday, May 3 at 2:30 PM.   Exam 4 covers chapters 14, 15, and 17, and material presented on March 29 through April 26 inclusive. If you click on the Today link to the left, and scroll down to May 3, you will find a review sheet, sample test (the PDF icon), and answers to the sample test.  Your test will have the same general format, but may cover slightly different material.  Remember that statistics is cumulative -- you cannot understand the material on this exam unless you understand (and remember) the previous material.  Most students find the fourth test significantly more difficult than the third.  BE SURE TO BRING A CALCULATOR AND YOUR LAPTOP WITH A FUNCTIONAL COPY OF SPSS 12.0.  You will not be allowed to use your laptop except for the final question.  The rest of the exam must be turned in before you start working on the final question.

Bring Laptops with SPSS on Wednesday, 4/26:
4/20/06

We will be using SPSS on Wednesday, 4/26.  Please bring your laptops.

Assignment 12 Is Due on 4/26:
4/20/06

To appease the administrators, assignment 12 is due by 11:59 PM on Wednesday, April 26.  I will accept, without penalty, assignment 12 until the start of our final exam on Wednesday, May 3.

Quiz 12 Should Be Taken before the Start of Class on Wednesday, 4/26:
4/20/06

Our final quiz, quiz 12, should be completed no later than 11 AM on April 26.

Assignment 11 Is Due on 4/26:
4/20/06

Assignment 11 is due by the start of class on Wednesday, April 26.

Bring Laptops with SPSS on Friday, 4/21:
4/19/06

We will be using SPSS on Friday, 4/21, so be sure to bring your laptops.  You will need to enter the data set into SPSS 12.0 before the start of class on Friday.

Quiz 11 Should Be Taken before the Start of Class on Wednesday, 4/19:
4/10/06

Quiz 11 is due before the start of Wednesday's class on 4/19.

Assignment 10 is Due on Wednesday, 4/12:
4/6/06

Assignment 10 is due at the start of class on Wednesday, 4/12.

Bring Laptops with SPSS on Friday, 4/7:
4/2/06

We will be using SPSS on Friday, 4/7, so be sure to bring your laptops.

Quiz 10 Should Be Taken before the Start of Class on Monday, 4/3:
3/31/06

Quiz 10 is due before the start of Monday's class on 4/3.

Exam 4 SPSS Requirement:
3/27/06

Exam 4 will contain a question that will require you to use SPSS.  As such, you need to be sure that your laptop has a functional copy of SPSS 12.  You will be required to email your SPSS output to me.  I will not be able to help you with technical issues during the exam.

3/27/06

Your grade for exam 3 is available from the Grades link in the list of links on the left.  For the 28 people who took the exam, the mean was 80.32, with a standard deviation of 10.66.  The median was 83.  A frequency histogram is below:

SPSS Tutorials:
3/22/06

I'm sorry about the computer problems today.  If you need a review of SPSS for assignment 9, click on the SPSS Tutorials link in the list to the left and then click on t-Tests.  The tutorials cover exactly what I did in class.

Welcome Back!:
3/18/06

I hope that you had a wonderful break and are ready to face the end of the semester.  Don't forget that quiz 9 is due before the start of class on Wednesday, 3/22, and that you are to bring your computers to class on Wednesday, 3/22.  Wednesday is also the last day to withdraw from the class.  After Wednesday's class, you will have the knowledge to complete assignment 9 which is due at the start of class on Friday 3/24.  The third exam is Monday, 3/27.

Have a Great Spring Break!:
3/10/06

Quiz 9 Should Be Taken before the Start of Class on Wednesday, 3/22:
3/10/06

Quiz 9 is due before the start of Wednesday's class on 3/22.

Assignment 9 Is Due by the Start of Class on Friday 3/24:
3/10/06

Assignment 9 should be submitted before the start of class on Friday, 3/24.  It covers material that will be presented on Wednesday, 3/22.

Exam 3 Is Monday, 3/27:
3/8/06

Exam 3 is Monday, March 27.   Exam 3 covers chapters 11, 12, and 13, and material presented on February 22 through March 24 inclusive. If you click on the Today link to the left, and scroll down to March 27, you will find a review sheet, sample test, and answers to the sample test.  Your test will have the same general format, but may cover slightly different material.  Remember that statistics is cumulative -- you cannot understand the material on this exam unless you understand (and remember) the previous material.  Most students find the third test significantly more difficult than the second.  BE SURE TO BRING A CALCULATOR.

Wednesday, 3/22, Is the Last Day to Withdraw:
3/8/06

Wednesday, March 22 is the last day to withdraw from the class.

Bring Laptops with SPSS on Wednesday, 3/22:
3/8/06

We will be using SPSS on Wednesday, 3/22, so be sure to bring your laptops.

Assignment 8 Is Due by the Start of Class on Friday 3/10:
3/6/06

Assignment 8 should be submitted before the start of class on Friday, 3/10.

Quiz 8 Should Be Taken before the Start of Class on Wednesday, 3/8:
3/6/06

Quiz 8 is due before the start of Wednesday's class on 3/8.

Quiz 7 Should Be Taken before the Start of Class on Wednesday, 3/1:
2/24/06

Quiz 7 is due before the start of Wednesday's class on 3/1.

Assignment 7 Is Due by the Start of Class on Monday 3/6:
2/24/06

Assignment 7 should be submitted before the start of class on Monday, 3/6.

Exam 2 Grades Have Been Posted:
2/21/06

Your grade for exam 2 is available from the Grades link in the list of links on the left.  For the 28 people who took the exam, the mean was 86.03, with a standard deviation of 9.83.  The median was 86.  A revised frequency histogram is below:

I will return the exam and go over it in class on Wednesday.

Quiz 6 Should Be Taken before the Start of Class on Wednesday, 2/15:
2/13/06

Quiz 6 is due before the start of Wednesday's class on 2/15.

Assignment 6 Is Due by the Start of Class on Friday 2/17:
2/13/06

Assignment 6 should be submitted before the start of class on Friday, 2/17.

Exam 2:
2/8/06

Exam 2 is Monday, February 20.   Exam 2 covers chapters 6 and 8 through 10, and material presented on January 25 through February 17 inclusive. If you click on the Today link to the left, and scroll down to February 20, you will find a review sheet, sample test, and answers to the sample test.  Your test will have the same general format, but may cover slightly different material.  Remember that statistics is cumulative -- you cannot understand the material on this exam unless you understand (and remember) the previous material.  Most students find the second test significantly more difficult than the first.

Assignment 5 Is Due by the Start of Class on Friday 2/17:
2/8/06

Assignment 5 should be submitted before the start of class on Friday, 2/17.  Make sure that you have the updated version (which utilizes the variables pace and sit.)  You may have to use the reload / refresh function of your browser to get the updated version.

Bring Laptops with SPSS on Wednesday, 2/8:
2/4/06

We will be using SPSS on Wednesday, 2/8, so be sure to bring your laptops.

Quiz 5 Should Be Taken before the Start of Class on Wednesday, 2/8:
2/3/06

Quiz 5 is due before the start of Wednesday's class on 2/8.

Assignment 4 Is Due by the Start of Class on Wednesday 2/8:
2/1/06

Assignment 4 should be submitted before the start of class on Wednesday, 2/8.

Bring Laptops with SPSS on Wednesday, 2/1:
1/30/06

We will be using SPSS on Wednesday, 2/1, so be sure to bring your laptops.

Quiz 4 Should Be Taken before the Start of Class on Wednesday, 2/1:
1/27/06

Quiz 4 is due before the start of Wednesday's class on 2/1.

Exam 1 Grades Have Been Posted:
1/23/06

Your grade for exam 1 is available from the Grades link in the list of links on the left.  For the 30 people who took the exam, the mean was 86.73, with a standard deviation of 7.51.  The median was 88.  A frequency histogram is below:

I will return the exam and go over it in class on Wednesday.  In general, the class did really well -- congratulations!

Wednesday 1/25 Is Last Day to Withdraw without a Record:
1/23/06

Wednesday, January 25, is the last day to withdraw without a record.

Assignment 3 Is Due by the Start of Class on Monday 1/30:
1/20/06

Assignment 3 should be submitted before the start of class on Monday 1/30.

Quiz 3 Should Be Taken before the Start of Class on Friday, 1/20:
1/17/06

Quiz 3 is due before the start of Friday's class.

Bring Laptops with SPSS on Friday, 1/20:
1/17/06

We will be using SPSS on Friday, 1/20, so be sure to bring your laptops.  Make sure that SPSS is functional on your laptops by loading this data set.  If you have problems opening the data set, see the help desk NOW (229-3888, Miriam Hall 53).  I will not have time in class to help you get SPSS loaded onto your laptop.

Exam 1:
1/12/06

Exam 1 is Monday, January 23.   Exam 1 covers chapters 1 – 5, and material presented on January 4 through January 20 inclusive. If you click on the Today link to the left, and scroll down to January 23, you will find a review sheet, sample test, and answers to the sample test.  Your test will have the same general format, but may cover slightly different material.

1/12/06

If you have not been reading the assigned chapter before the start of class, now is the time to start doing so.  Friday's material (measures of dispersion) tends to be the first material that gives students problems.  Unfortunately, it is also material that is key to understanding much of the rest of the course (including correlation, regression, Z-score tests, t-tests, and ANOVA.)  If you do not understand standard deviation (one of the measures of dispersion), you will not understand the rest of the course (except maybe the final week.)

Assignment 2 Is Due by the Start of Class on Wednesday 1/18:
1/11/06

Assignment 2 should be submitted before the start of class on Wednesday 1/18.

Quiz 2 Should Be Taken before the Start of Class on Friday 1/13:
1/11/06

Quiz 2 is due before the start of Friday's class.

Assignment 1 Is Due at the Start of Class on Wednesday 1/11:
1/6/06

Assignment 1 should be submitted before the start of class on Wednesday 1/11.

Quiz 1 Should Be Taken before the Start of Class on Monday 1/9:
1/6/06

Quiz 1 should be taken before the start of class on Monday, 1/9.  You can either click on the Quizzes link in the list of links on the left or click on the Today link and then on the Quiz 1 link for 1/9.  The quiz consists of 10 multiple choice questions.  The quiz is open book and notes.  If you are not absolutely sure of an answer, look it up before submitting the quiz; don't waste these essentially free points.

Introductory Assignment Is Due Friday 1/6:
1/4/06

The introductory assignment is due on Friday 1/6.   Like all assignments, you can find the assignment by clicking on the Today link in the list of links on the left.

Welcome!:
12/15/05

Welcome to PSY 216, Elementary Statistics.  This will be a very important class in your undergraduate career as a psychologist in training.  Why?  First, you need a strong background in statistics in order to do well in PSY 217, Experimental Psychology and to understand the results of studies that are presented in content classes.  But more importantly, statistics allow psychologist to interpret the results of studies.  These results often improve our theories of psychological phenomena and improve the treatments that we can offer people with psychological disorders.  Even psychologists who do not perform studies need to understand statistics, as psychologists are ethically obliged by the American Psychological Association to stay current in their areas of expertise; to do so requires reading journal articles which often contained the results of statistical analysis of data.  Even if you will never be a psychologist, statistical expertise is a characteristic that employers look for when they interview psychology majors for jobs.

I hope that you enjoy the semester and our exploration of elementary statistics (yes -- there are many other statistical methods that are much more advanced that what we will cover.  Some of them you will learn about in graduate school -- most Ph.D. programs in Psychology require at least one year of graduate course work in statistics.)  Don't get behind in class, and ask questions when you have them.

*Current time and time until next exam are based on your computer's clock.
If your computer's clock is wrong, these values will be wrong too.