The normal curve 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.
- 5 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
Normal mean 50 sd 5, percent between 45 and 55- A) 68%
- B) 6800%
- C) 0.15%
- D) 34%
2 Question 2
Normal mean 100 sd 15, percent between 70 and 130Type the answer.
3 Question 3
Normal mean 20 sd 4, percent between 16 and 24- A) 0.15%
- B) 6800%
- C) 68%
- D) 34%
4 Question 4
Normal mean 50 sd 5, percent above 60Type the answer.
5 Question 5
Normal mean 40 sd 3, percent between 40 and 46- A) 47.5%
- B) 4750%
- C) 13.5%
- D) 34%
6 Question 6
Normal mean 12 sd 2, percent between 8 and 14Type the answer.
7 Question 7
Normal mean 65 sd 5, percent below 75- A) 2.35%
- B) 0.15%
- C) 9750%
- D) 97.5%
8 Question 8
Normal mean 36 sd 2, percent below 34Type the answer.
9 Question 9
Normal mean 100 sd 15, percent between 85 and 130- A) 8150%
- B) 81.5%
- C) 34%
- D) 13.5%
10 Question 10
Normal mean 160 sd 7, percent between 153 and 174Type the answer.