SAT MATH • ANSWER CHECK
Sampling Inference & Experimental Design
Complete the practice first, then open each answer to check your work. These answers match the revised September 2026 worksheets.
For a wrong answer, identify the cause: concept, algebra, arithmetic, interpretation, calculator choice, or timing. Equivalent exact numerical forms are accepted for these practice exercises.
Question 1
Answer: B
B. All current library cardholders
Question 2
Answer: B
B. support a cause-and-effect conclusion
Question 3
Answer: B
B. The responses are voluntary and may be biased.
Question 4
Answer: C
C. The sample of 800
Question 5
Answer: B
B. 50% to 58%
Question 6
Answer: C
C. 60%
Question 7
Answer: B
B. the company’s 900 employees
Question 8
Answer: C
C. It is plausible that the true population mean is between 71 and 75 hours.
Question 9
Answer: D
D. Assign each student a random number and use the number to determine the method.
Question 10
Answer: B
B. Randomly sample 400 students from the freshman class.
Question 11
Answer: C
C. There is an association, but causation is not established.
Question 12
Answer: B
B. Poll B should have the smaller margin of error.
Question 13
Answer: B
B. 10,800
Question 14
Answer: B
B. Poll B is more precise because its margin of error is smaller.
Question 15
Answer: A
A. The sample may not represent all students.
Question 16
Answer: C
C. Randomly sample within each grade in proportion to that grade’s enrollment.
Question 17
Answer: A
A. Version A caused the improvement for the sampled customers, and the result can reasonably be generalized to the customer base.
Question 18
Answer: B
B. Nonresponse could make the respondents systematically different from those who did not respond.