Sample means and the central limit theorem Quiz
10 questions · easy to harder · University 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
Samples of 36 from mean 50, sd 12: P(sample mean > 53)- A) 1.5
- B) 50
- C) 0.0668
- D) 0.4013
2 Question 2
Samples of 25 from mean 100, sd 15: P(sample mean < 97)Type the answer.
3 Question 3
Samples of 16 from mean 70, sd 8: P(sample mean > 73)- A) 1.5
- B) 0.0668
- C) 70
- D) 0.352
4 Question 4
Samples of 64 from mean 20, sd 4: P(sample mean < 19.5)Type the answer.
5 Question 5
Samples of 100 from mean 500, sd 50: P(sample mean > 510)- A) 0.4207
- B) 0.0228
- C) 2
- D) 500
6 Question 6
Samples of 16 from mean 50, sd 12: P(sample mean < 47)Type the answer.
7 Question 7
Samples of 25 from mean 64, sd 10: P(60 < sample mean < 66)- A) 8.185
- B) 0.8185
- C) 1
- D) 64
8 Question 8
Samples of 40 from mean 50, sd 12: P(sample mean > 53)Type the answer.
9 Question 9
Samples of 64 from mean 12, sd 2: P(11.6 < sample mean < 12.5)- A) 9.224
- B) 0.9224
- C) 12
- D) 2
10 Question 10
Samples of 9 from mean 60, sd 6: P(sample mean > 64)Type the answer.