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AP Statistics

AP Statistics Unit 1 Part 2

Shared by shashankc · Oct 13, 2026 · 0 plays

Winning entry for the "Make a practice set on AP Statistics Unit 1 Part 2" special event.

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35 questions across 4 sections. After every answer you’ll see why each choice is right or wrong, not just the one you picked.

Round length
Sections (none selected means all)

Sample questions

Open a question to see the answer choices and the correct answer.

A principal wants the opinion of all 850 students in her school about a new bell schedule. She gives every student a survey and every student returns it. This is best described as:
  1. A. a simple random sample
  2. B. a census ✓
  3. C. a stratified sample
  4. D. an experiment

Correct answer: B.

Researchers record the hours of sleep and the grade point average of 200 teenagers over one semester. They do not change anything about the teens' routines. Which describes this study?
  1. A. an observational study ✓
  2. B. an experiment
  3. C. a census
  4. D. a matched-pairs experiment

Correct answer: A.

Sixty volunteers are placed by a chance process into two groups. One group drinks coffee and the other drinks decaffeinated coffee before a memory test. Researchers then compare test scores. Which describes this study?
  1. A. an observational study
  2. B. a census
  3. C. an experiment ✓
  4. D. a retrospective study

Correct answer: C.

Researchers read through hospital records of 5,000 adults to see whether past smoking is related to current lung disease. Which best describes this study?
  1. A. a prospective observational study
  2. B. an experiment
  3. C. a randomized block experiment
  4. D. a retrospective observational study ✓

Correct answer: D.

A study investigates whether the number of hours a student spends on screens each day helps explain differences in the student's GPA. Which is the response variable?
  1. A. Hours of screen time
  2. B. GPA ✓
  3. C. The student
  4. D. The school the student attends

Correct answer: B.