The durations of 60 telephone calls ar summarised in the table below. Duration (minutes) 0-9- 18- 27-36-45-
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The durations of 60 telephone calls ar summarised in the table below. Duration (minutes) 0-9- 18- 27-36-45- Number of calls 6 10 21 20 3 0 Use linear interpolation to estimate the probability that the duration of a call, selected at random from the 60 calls, exceeds 30 minutes.
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A Concise Course In Advanced Level Statistics With Worked Examples
ISBN: 9780748754755
4th Edition
Authors: J. Crawshaw, J. Chambers
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