Each of the 70 trainees at a secretarial college was asked to type a copy of a

Question:

Each of the 70 trainees at a secretarial college was asked to type a copy of a particular document. The times taken are shown, correct to the nearest 0.1 minutes, in the following table.

a. Explain why the interval for the first class has a width of 0.3 minutes.

b. Represent the times taken in a histogram.

c. Estimate, to the nearest second, the upper boundary of the times taken by the fastest 10 typists.

d. It is given that 15 trainees took between 3.15 and b minutes. Calculate an estimate for the value of b when:

i. b > 3.15

ii. b < 3.15.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

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Question Posted: Sep 10, 2021 02:07 AM

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Each of the 70 trainees at a secretarial college was asked to type a copy of a

Question:

Time tak 2.6-2.8 2.9-3.0 3.1-3.2 3.3-3.7 es (f) 15 25 20 10

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a Class widthUpper boundary Lower boundary 292603 ...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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