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Maths Exercices

Histograms

A histogram is a type of bar graph that represents the frequency of data that has been grouped in several intervals.

Read the histogram and answer the following questions:

  1. How many workers are in the maximum salary group? 5 workers.
  2. In which salary group are the maximum workers? 930-940.
  3. What is the size of each class? 10.
  4. How many workers get less than $930? 55 workers.
  5. How many get $930 or more? 70 workers.
  6. What is the total number of workers? 125 workers.

Robert asked his students how much TV they watched at night. He graphed the results in a histogram.



How many students watch more than two hours of TV each night?



Solution: students