Weekend!

After a short week it's already Friday...your homework this weekend is to STUDY FOR THE TEST! Remember, the test includes 12 multiple choice and 1 free response question. You will have the entire period (and if you finish early I'll give you some homework to start...)

Also, STAMPS ARE DUE MONDAY. Here's the deal for stamps....

• They must be collected and stapled/paperclipped together.
• The total number of stamps must be clearly written on the front (or I'll just assume you only have 1....)
• Double check your count! If your count is off (at all) when I double check you will be given a "0." No lieing (or counting wrong!)
• Not sure if it counts? Anything that is literally a stamp counts...

And finally, the answers to the few practice questions for the test are below...

1. According to the this data, each year the predicted average life expectancy in the U.S. increases by approximately 0.2157 years.

2. According to the model, in the year "0" the predicted average life expectancy was -353.87 years. This is unrealistic--life expectancy cannot be negative, nor should we consider the U.S. in year "0."

3. This R^2 tells us that 95.39% of the changes in life expectancy are due to changes in the year. Other factors may include advancement in medicine/science or the economic status of the U.S.

4. r = sqroot(0.9539) = 0.977

5. Residual = actual - predicted = 77.9 - 79.0399 = -1.1399 (I got the predicted value by substituting 2007 in the Least Squares Regression Line equation)