MS 150 Statistics Spring 2003 Quiz 3 • Name: ________________

For the following six graphs, determine whether the relationship is linear,non-linear, or random; and, if linear, determine whether it is positive or negative.

1. ______________________________
2. ______________________________
3. ______________________________
4. ______________________________
5. ______________________________
6. ______________________________

Use the following data for this quiz

1. __________ Calculate the slope of the best fit (also known at least squares) line for the data.
2. __________ Calculate the y-intercept of the best fit line.
3. ______________ Is the correlation positive, negative, or neutral?
4. _______ How many nurses were predicted to be in the program in 2000 (x=5)?
5. _______ What year was the program predicted to have 12 nurses?
6. _______ What year was the program predicted to have zero nurses?
7. _______ How many nurses are predicted to be in the program by the best fit line in 2005?