Histograms with unequal class widths Quiz
7 questions · easy to harder · Statistics · score and step-by-step answers
How it works
- 7 questions, about 21 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
Histogram: class 20-40 has frequency density 1.5, find the frequency- A) −30
- B) 32
- C) 30
- D) 20
2 Question 2
Histogram: class 10-15 has frequency density 4, find the frequencyType the answer.
3 Question 3
Histogram: class 0-25 has frequency density 0.8, find the frequency- A) −20
- B) 20
- C) 45
- D) 25
4 Question 4
Histogram: class 50-80 has frequency density 0.4, find the frequencyType the answer.
5 Question 5
Histogram: class 15-20 has frequency density 2.4, find the frequency- A) 5
- B) 12
- C) 125
- D) −12
6 Question 6
Histogram: class 30-60 has frequency density 1.2, find the frequencyType the answer.
7 Question 7
Histogram: class 40-100 has frequency density 0.25, find the frequency- A) 14
- B) 60
- C) −1500
- D) 15