SOCI 212/2: STATISTICS I / FALL 2014 SIXTH ASSIGNMENT To the relationship between Alcohol consumption (X) and Type of accident (Y), we introduce Speed (Z) as a control variable, in order to determine the kind of relationship that exists between X and Y as well as the type of variable Z is. Speed High Low Type of accident Minor Major Total Alcohol consumption Little Moderate Much All 40 22 10 72 22 23 15 60 62 45 25 132 Little 38 20 58 Alcohol consumption Moderate Much 25 11 40 44 65 55 All 74 104 178 1. Use an appropriate measure of association to compute the partial associations of the first-order relationship between X & Y controlling for Z. Explain. 2. Construct a table showing the zero-order relationship between Alcohol consumption (X) and Type of accident (Y). Use an appropriate measure of association to calculate the strength and direction of this relationship. Explain. 3. Construct a table showing the zero-order relationship between Alcohol consumption (X) as independent and Speed (Z) as dependent. Use an appropriate measure of association to calculate the strength and direction of this relationship. Explain. 4. Construct a table showing the zero-order relationship between Speed (Z) as independent and Type of accident (Y) as dependent. Use an appropriate measure of association to examine the strength and direction of this relationship. Explain 5. From the previous answers, explain what type of control variable Speed (Z) is. What type of relationship is there between X and Y when Z is controlled