For which of these research situations would you MOST likely calculate a correlation coefficient?

A) independent variable = blood type; dependent variable = political affiliation
B) independent variable = height; dependent variable = salary
C) independent variable = ethnicity; dependent variable = favorite food
D) independent variable = gender; dependent variable = type of car owned

If you were to analyze data from written police records from 2000 until 2010, you would be engaging in what type of research?

A) experimental research
B) survey research
C) observational research
D) archival research

The statement r_xy  0 represents ______.

A) the null hypothesis
B) the t statistic
C) the mean difference
D) the research hypothesis

Find a number such that the sum of the number and its reciprocal is $\frac{65}{8}$ .

A) 8 or $\frac{1}{8}$
B) 11 or 1
11
C) 12 or $\frac{1}{12}$
D) $9$ or $\frac{1}{9}$
E) $10$ or $\frac{1}{10}$

Simplify the radical $\sqrt{\frac{x^{18}}{121y^2}}$ .

A) $\frac{x^{18}}{11y}$
B) $\frac{x^9}{11}$
C) $\frac{x}{11y}$
D) $\frac{x^9}{11y}$
E) $\frac{x^9}{y}$