z-scores 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.
- 4 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
Calculate z-score of 62, mean 50, sd 8- A) 1.5
- B) 55.75
- C) 15
- D) −1.5
2 Question 2
Calculate z-score of 70, mean 60, sd 5Type the answer.
3 Question 3
Calculate z-score of 80, mean 80, sd 6Type the answer.
4 Question 4
Find the value with z = 2, mean 50, sd 4.Type the answer.
5 Question 5
Calculate z-score of 34, mean 40, sd 4- A) −15
- B) 1.5
- C) −1.5
- D) 24
6 Question 6
Calculate z-score of 72, mean 65, sd 4Type the answer.
7 Question 7
Find the value with z = −1.5, mean 60, sd 4.- A) 5.4
- B) 54
- C) −54
- D) 540
8 Question 8
Calculate z-score of 140, mean 100, sd 16Type the answer.
9 Question 9
Calculate z-score of 47, mean 40, sd 6- A) 11.7
- B) 40.33
- C) −1.17
- D) 1.17
10 Question 10
Find the value with z = 2.5, mean 150, sd 12.Type the answer.