The correlation coefficient 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
Correlation coefficient of (1, 2) (2, 4) (3, 6) (4, 8) (5, 10)- A) r = 20
- B) r = 120
- C) r = 3
- D) r = 1
2 Question 2
Correlation coefficient of (1, 9) (3, 6) (5, 4) (7, 1)Type the answer.
3 Question 3
Correlation coefficient of (1, 2) (2, 4) (3, 5) (4, 4) (5, 10)- A) r ≈ 360
- B) r ≈ 0.843
- C) 0.044
- D) r ≈ 3
4 Question 4
Correlation coefficient of (1, 5) (2, 4) (3, 6) (4, 3) (5, 7)Type the answer.
5 Question 5
Correlation coefficient of (1, 4) (3, 5) (5, 9) (7, 8) (9, 14)- A) 0.019
- B) r ≈ 0.924
- C) r ≈ 2480
- D) r ≈ 5
6 Question 6
Correlation coefficient of (10, 20) (20, 30) (30, 25) (40, 45)Type the answer.
7 Question 7
Correlation coefficient of (3, 7) (5, 4) (7, 6) (9, 3)- A) r ≈ 200
- B) r ≈ 5
- C) r ≈ −0.707
- D) r ≈ −0.05
8 Question 8
Correlation coefficient of (1, 12) (2, 10) (3, 11) (5, 7) (6, 6) (7, 2)Type the answer.
9 Question 9
Correlation coefficient of (5, 60) (10, 70) (15, 65) (20, 85) (25, 95)- A) 0.002
- B) r ≈ 0.922
- C) r ≈ 212500
- D) r ≈ 15
10 Question 10
Correlation coefficient of (2, 3) (3, 6) (5, 4) (6, 9) (9, 8)Type the answer.