Which of the following statements is true?
A. The range of the October temperatures for Hendersonville is greater than the range of October
temperatures for Sheboygan.
B. The median October temperature for Hendersonville is less than the median October
temperature for Sheboygan.
C. The median of the October temperatures for Hendersonville is greater than the third quartile of
the October temperatures for Sheboygan.
D. The mean of the October temperatures for Hendersonville is less than the mean of the October
temperatures for Sheboygan.
E. The interquartile range of the October temperatures for Hendersonville is about the same as the
interquartile range of the October temperatures for Sheboygan.
Biologists around the world have increased efforts at conservation. Monitoring wildlife
populations is important so that appropriate management efforts can be implemented, but such
monitoring is often difficult. One study found a cheap and easy way to estimate the number of
nesting sites of terns (a type of seabird) by monitoring the number of calls heard per minute. More
calls happen when there are more birds, as one would expect. In fact, it turned out that the number
of calls explained 71% of the variation in the abundance of nests between breeding sites. Which of
the following statements is correct about the correlation between the number of calls and the
abundance of nests?
A. The correlation coefficient is –0.71.
B. The correlation coefficient is 0.71.
C. The correlation coefficient is –0.84.
D. The correlation coefficient is 0.84.
E. The slope of the regression line is needed to determine the correlation.
- A woman who works for a department store wants to sue the company for discrimination based on
gender. Her reasoning is that women seem less likely to get promoted than men. She presented this
table showing the employees eligible for promotion divided by both gender and whether they were
promoted or not. Does the table provide some evidence to support her claim?