Margin of error Quiz
10 questions · easy to harder · Statistics · score and step-by-step answers
How it works
- 10 questions, about 30 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 8 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. A calculator is on the screen.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
A survey says 52% with a margin of error of 3%. Is 50% a plausible value?- A) Yes
- B) No
2 Question 2
A survey says 40% with a margin of error of 4%. Is 45% a plausible value?- A) Yes
- B) No
3 Question 3
A survey says 35% with a margin of error of 2%. What are the plausible values?Type the answer.
4 Question 4
A poll says 48% with a margin of error of 3%. What are the plausible values?Type the answer.
5 Question 5
A survey says 55% with a margin of error of 4%. Is 50% a plausible value?- A) Yes
- B) No
6 Question 6
The mean height in a sample is 152 cm with a margin of error of 3 cm. Is 150 cm a plausible value for the mean?- A) Yes
- B) No
7 Question 7
A poll finds that 54% of voters like the plan, with a margin of error of 5%. Can we be sure that more than half of all voters like the plan?- A) Yes
- B) No
8 Question 8
A survey says 30% with a margin of error of 3.5%. Is 27% a plausible value?- A) Yes
- B) No
9 Question 9
A survey finds that 46% of people agree, with a margin of error of 3%. Can we be sure that more than half of all people agree?- A) Yes
- B) No
10 Question 10
The mean in a sample is 12.6 with a margin of error of 1.2. Is 14 a plausible value for the mean?- A) Yes
- B) No