The speeds of 72 coaches at a certain point on their journeys between two cities were recorded.
Question:
The speeds of 72 coaches at a certain point on their journeys between two cities were recorded. The results are given in the following table.
a. State the number of coaches whose speeds were between 54 and 70km/h.
b. A student has illustrated the data in a cumulative frequency polygon. Find the two speeds between which the polygon has the greatest gradient.
c. Calculate an estimate of the lower boundary of the speeds of the fastest 25 coaches.
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Step by Step Answer:
a From the table we can see that there are 41 coaches with speeds less than or equal to 70 kmh and t...View the full answer
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Related Book For 
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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