Sean wants to investigate the effect of temperature on the rate of a chemical reaction.

What type of variable is the temperature in Sean's experiment?

• a.)
• Confounding
• b.)
• Explanatory
• c.)
• Dependent
• d.)
• Response

Which of these represents anopenquestion?

• a.)
• Can I help you?
• b.)
• Who helped you?
• c.)
• How can I help you?
• d.)
• Will this help you?

After reading a survey in Modern Dog Magazine that reported that 74% of Americans prefer dogs, Kendra is curious about the survey's reliability. She finds out that the study used an outside research organization to select 1,000 people each year for seven years. The results from each year are below.

YearPercentage that Prefers Dogs175%276%379%473%571%674%771%

Select the statement that is true about Modern Dog Magazine's survey.

• a.)
• The survey results are accurate but not precise.
• b.)
• The survey results are both accurate and precise.
• c.)
• The survey results are precise but not accurate.
• d.)
• The survey results are neither accurate nor precise.

In 2000, there were 4,578 residents living in multi-family housing units. In 2010, there were 4,312 residents living in multi-family housing units.

Select the true statement about residents living in multi-family housing units from 2000 to 2010. Percentages are rounded to the nearest tenths place.

• a.)
• The absolute change is 266 residents and the relative change indicates an increase of 5.8%.
• b.)
• The absolute change is -266 residents and the relative change indicates a decrease of 5.8%.
• c.)
• The absolute change is 266 residents and the relative change indicates an increase of 6.2%.
• d.)
• The absolute change is -266 residents and the relative change indicates a decrease of 6.2%.

A company's market share went from 50 to 40 percent of the total market.

Of the following choices, which two statements about the company's market shares are true?

• a.)
• There was a 20% decrease in market shares.
• b.)
• There was a 25% decrease in market shares.
• c.)
• There was a 10% decrease in market shares.
• d.)
• Market shares dropped by 20 percentage points.
• e.)
• Market shares dropped by 25 percentage points.
• f.)
• Market shares dropped by 10 percentage points.

(Two items need to be selected)

The following are the Consumer Price Index (CPI) for the years 1990-1992. All of the values use a reference year of 1985.

YearCPI199011419911301992145

Whichof the following is true about the CPI, based on the information?

• a.)
• $100 in 1991 would have been worth $100 in 1990.
• b.)
• $100 in 1985 would be equivalent to $145 in 1992.
• c.)
• $100 in 1992 would be equivalent to $130 in 1991.
• d.)
• $100 in 1990 would have been worth $114 in 1985.