Tuesday, October 28, 2008

Unit II Test

So now it is time for our first test dealing with Unit II. The material covered is from Chapter 7 and 8...understanding everything about correlation from Chapter 7, and being able to interpret, calculate, and make predictions with a least squares line from Chapter 8. There will not be any material covered from Chapter 9 and 10.

In preparation for the Unit II Test, there should be a focus on answering the question that is asked. No need to elaborate with generalizations as long as you answer the question and support it (if necessary). Look over both chapters and make sure you can perform all the skills listed at the end of each chapter.

Anyone that needs extra help: use Google, look in the Statistics resources section of the wiki. The Statistics walkthrough that is found there is quite valuable.

That's it for now...

-Mr. C

Monday, October 27, 2008

Friday's Graded Activity

The graded activity that was given on Friday will in fact not be graded. It seemed as if things were 50-50 as far as understanding goes, so I wanted to investigate to see just where the understanding level of the entire class was.

I can't stress enough that you need to use all resources available to you. Do the readings. Do the homework by putting a strong effort into it. Look online for alternative explanations. Something as simple as Googling "linear regression" can provide a great deal of sites with a lot of information.

Chapter 7 and 8 need to go together, and over the next day or two I want us to understand them together. We will spend a lot of time Monday doing some error correction with some past assignments (Ch. 7 Quiz and the AP Questions).

You're learning something when you're uncomfortable and feel like you don't totally understand.

-Mr. C

Saturday, October 25, 2008

Unit I Test Performance

So, my first blog entry will be providing summary statistics of the Unit I test, and discussing where we go from here.

First of all, great job on the multiple choice. Out of 10 multiple choice questins, the mean score for the multiple choice was a 6.8 with a standard deviation of 1.5. The median score was a 7 and the IQR was 2 (the third quartile was 8, the first quartile was 6). Pretty remarkable that 75% of students got 6 out of 10 correct on the multiple choice. Great job!

Out of a total of 20 points, free response had a mean score of 12.5 with a standard deviation of 2.8. The median score was 12.5 with an IQR of 4 (Q3 was 14.5, Q1 10.5).

This is good for the Unit I Test, much better than my results last year. The areas to improve upon are the free response. It appears as if there is a great deal of uncertainty as to what to include, what not to include. Solutions for this are for me to continue to provide examples of student work that shows what is needed (like the images of student work in reviewing for the test). I will also say that it is imperative that you know the material front and back. You need to have a strong knowledge base in a subject matter before you begin to write about it and interpret it. I suggest with homework that you spend some time practicing this skill, doing it so that it is finished in a short amount of time will not help you. I assign only 4 exercises or so each night in the hopes that you can do the highest quality of work with the homework.

That's the first blog entry, feel free to comment. Enjoy!