EXAM REVIEW #4 EXERCISES

# EXAM REVIEW #4 EXERCISES - Questions 1-17: A researcher...

This preview shows pages 1–3. Sign up to view the full content.

Questions 1-17: A researcher wants to know about the relationship between hours middle school students spend playing video games per week and days out sick from school per year. Specifically she wants to know if more video game watching leads to more sick days. The following is a hypothetical set of data for those two variables. Answer the following questions based on the given data. Stude nt Hours of Video per Week Number of days absent due to sickness per year 1 5 6 2 14 7 3 2 1 4 10 5 5 6 5 6 4 3 7 8 4 8 3 1 1. Which is the X variable and which is the Y variable? 2. Calculate the mean of X 3. Calculate the mean of Y 4. Calculate the Variance of X 5. Calculate the Variance of Y 6. Calculate the Standard Deviation of X 7. Calculate the Standard Deviation of Y

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
8. Calculate the Covariance of X,Y 9. Using the above information calculate b (the slope). 10. Calculate a . 11. What is the regression equation, or model? 12.
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 07/13/2011 for the course SOC 301 taught by Professor Heberle during the Spring '11 term at University of Louisville.

### Page1 / 4

EXAM REVIEW #4 EXERCISES - Questions 1-17: A researcher...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online