Product moment and Spearman's rank correlation Quiz

1. Given $S_{xx}=100$, $S_{yy}=36$ and $S_{xy}=48$, find $r$.

• A. $0.8$
• B. $1.33$
• C. $0.48$
• D. $0.6$

2. $r=0.7$ between $x$ and $y$. What is $r$ between $x$ and $5-3y$?

• A. $0.7$
• B. $2.1$
• C. $-0.7$
• D. $-2.1$

3. Two values are tied for 4th and 5th place. What rank does each receive?

• A. $4$
• B. $4.5$
• C. $5$
• D. $9$

4. For $n=5$ and $\sum d^2=4$, find $r_s$.

• A. $0.2$
• B. $0.967$
• C. $0.9$
• D. $0.8$

5. Which condition is needed for the PMCC test?

• A. Data are ranked
• B. Bivariate normal population
• C. No tied values
• D. A monotonic relationship only