HiSET: Math : Make predictions and solve problems based on data

Study concepts, example questions & explanations for HiSET: Math

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Example Questions

Example Question #1 : Make Predictions And Solve Problems Based On Data


Researchers performed a survey of the populations of several small islands. The data is represented by the following histogram. 

Bar graph data 2

What percentage of islands surveyed had a population of less than 140?

Possible Answers:

55%

65%

0%

35%

30%

Correct answer:

65%

Explanation:

On the horizontal axis of a histogram, you have labels representing ranges of values. For example, the label "140–159" represents the range of islands with populations between 140 and 159. 

The question asks for the percent of islands with populations under 140. The ranges that are smaller than 140 are the "120–139" range and the "100–119" range. Match the bars of each with the percents on the vertical (y) axis. The percents corresponding to these ranges are 35% and 30%, respectively.

Adding both of these percents yields the answer, 65%.

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