1. Cindy measured and recorded the temperature of a liquid for an experiment. She used a poorly calibrated thermometer and noted the temperature as 100.5 degrees Fahrenheit. The actual temperature of the liquid was 95 degrees Fahrenheit.

The percent error in her calculation is __________.

• 4.08%
• 5.79%
• -5.79%
• -4.08%

2. Jenae's study ignored the fact that only some of her coffee choices had caffeine, even though her co-workers preferred caffeinated coffee. Therefore, Jenae decided to label one type of decaffeinated coffee as having caffeine to see what would happen.

As she anticipated, this coffee became more popular with her co-workers, and they claimed that the extra boost of caffeine helped them focus on their work.

The growing popularity of the decaffeinated coffee among co-workers, under the false impression that it gave them extra caffeine, is an example of ________.

• a control group
• a treatment group
• a case-control study
• the placebo effect

3. A travel agency contacted a department store and obtained the list of all people who made purchases using their credit cards at the store in the last month. The agency then surveyed a random sample from the list, calling them to ask their preference for air travel or train travel for taking holidays.

Which of the following types of bias affects the conclusions of the survey?

• Deliberate bias
• Selection bias
• Non-response bias
• Response bias

4. Which of the following data types will be continuous?

• Number of chairs in a house
• Cost of a can of tuna fish
• Number of people in a family
• Height of a toddler