AP Statistics: Experimental Design

Which of the following best describes a completely randomized experimental design?

• Subjects are assigned to groups based on their characteristics.

• Subjects are randomly assigned to treatment groups, and each group receives a different treatment.

• Every subject receives all treatments in a random order.

• Subjects are observed without any intervention.

Tags

CCSS.HSS.IC.B.3

What is the primary purpose of a control group in an experiment?

• To ensure every subject receives the treatment.

• To provide a baseline for comparison with the treatment group.

• To increase the sample size.

• To eliminate the need for randomization.

Tags

CCSS.HSS.IC.B.3

A researcher wants to study the effect of a new fertilizer on plant growth. She divides 100 plants into two groups: one randomly receives the new fertilizer, and the other receives no fertilizer. What type of experimental design is this?

• Matched pairs design

• Observational study

• Completely randomized design

• Block design

Tags

CCSS.HSS.IC.B.3

Which of the following is NOT a characteristic of a well-designed survey?

• Random selection of participants

• Leading questions

• Clear and unbiased wording

• Adequate sample size

Tags

CCSS.HSS.IC.B.3

In a block design, blocks are formed based on:

• The treatments to be compared

• The order in which treatments are given

• Similar characteristics among experimental units

• The number of control groups

Tags

CCSS.HSS.IC.B.3

Which of the following best describes a matched pairs design?

• Each subject receives all treatments in a random order.

• Subjects are paired based on similar characteristics, and each pair receives different treatments.

• Subjects are randomly assigned to groups.

• All subjects receive the same treatment.

Tags

CCSS.HSS.IC.B.3

A survey asks, "Do you agree that the new school policy is beneficial?" What is the main issue with this question?

• It is too long.

• It is a leading question.

• It is open-ended.

• It is too specific.

Tags

CCSS.RI.2.1

CCSS.RI.3.1

CCSS.RL.1.1

CCSS.RL.2.1

CCSS.RL.3.1

Which of the following is an example of a confounding variable in an experiment testing a new drug?

• The color of the pill

• The age of the participants

• The dosage of the drug

• The number of participants

Tags

CCSS.HSS.IC.B.3

Why is randomization important in experimental design?

• It ensures that the sample size is large.

• It eliminates the need for a control group.

• It reduces the effects of confounding variables.

• It guarantees the treatment will be effective.

Tags

CCSS.HSS.IC.B.3

Which of the following best describes a double-blind experiment?

• Only the subjects do not know which treatment they receive.

• Only the researchers do not know which treatment is given.

• Both the subjects and the researchers do not know which treatment is given.

• Both the subjects and the researchers know which treatment is given.

Tags

CCSS.HSS.IC.B.3