Intervals, Graphs And Charts, Measurements Worksheet With Answers
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27Q1.
Tom collects information about how long the phone calls are in his house.
He makes a frequency table using class intervals of 30 seconds.
Here is part of the table.
The longest call was 175 seconds.
Which class interval does this fit into?
1 mark
Altogether he recorded 91 calls.
Tom makes a rough estimate that half the calls lasted less than 75 secs.
Explain how he could make this estimate.
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1 mark
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