Describe why the claims of these studies might be suspect.

In High Point County there are 672 raccoons.

Identify the independent and dependent variables for each study.

51. In an article in the British Journal of Nutrition, two types of mice were randomly selected. One group received a thyme supplement for a specific time, while another group was used as a control group and received no supplements. The brains of the mice were then analyzed, and it was found that the brains of the group of mice that received the thyme supplements had antioxidant levels similar to those of younger mice. It was concluded that the thyme supplement increased the antioxidants in the brains of the mice.

Provide the boundary of the value.

$9.54$ millimeters.

Give the boundary of the value.

36. $105.4$ miles.

Classify the variable as qualitative or quantitative.

The different species of fish are sold by a pet shop store.

Describe why the claims of these studies might be suspect.

56. Only $5 \%$ of men surveyed said that they liked "chick flicks."

Ratings of fiction books excellent, good, fair, poor. Classify as nominal-level, ordinal-level, interval-level, or ratio-level measurement.

Describe why the claims of these studies might be suspect.

53. Based on a recent telephone survey, $72 \%$ of those contacted shop online.

Employment discrimination? Census data for New York City indicate that $29.2 \%$ of the under-18 population is white, $28.2 \%$ black, $31.5 \%$ Latino, $9.1 \%$ Asian, and $2 \%$ are of other ethnicities. The New York Civil Liberties Union points out that of 26,181 police officers, $64.8 \%$ are white, $14.5 \%$ are black, $19.1\%$ Hispanic, and $1.4\%$ Asian. Do the police officers reflect the ethnic composition of the city's youth? (Equate Latino with Hispanic.)

b) Review the assumptions.

Examining Maps Study the map of European exploration on page $34$. How do you think the Crusades assisted the development of the trade routes throughout the European and Asian continents?

Identify the independent and dependent variables for each study.

50. People who walk at least 3 miles a day are randomly selected, and their blood triglyceride levels are measured in order to determine if the number of miles that they walk has any influence on these levels.

Find whether each statement is true or false. If the statement is false, describe why.

5. The variable temperature is an example of a quantitative variable.

Suppose you are a member of a research team and have become increasingly concerned about drug use by professional sports players as one of several factors affecting people's attitudes toward drug use in general. You set up a plan and conduct a survey on how people believe the American culture (television, movies, magazines, and popular music) influences illegal drug use. Your survey carries 2250 adults and adolescents from around the country. A consumer group petitions you for more information about your survey. Reply to the following questions about your survey.

5. Which of the methods (stratified, systematic, cluster, volunteer, or convenience) did you use?

Describe a population that may have been used and explain how the sample might have been selected.

5. Time magazine reported that $83 \%$ of people with household earnings over $\$ 200,000$ have a bachelor's degree.