The following table shows the lifetimes, to the nearest 10 days, of a certain brand of light

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The following table shows the lifetimes, to the nearest 10 days, of a certain brand of light bulb.

a. Use upper class boundaries to represent the data in a cumulative frequency graph and estimate the median lifetime of the light bulbs.

b. How might the manufacturer choose a value to use as the average lifetime of the light bulbs in a publicity campaign? Based on the figures in the table, investigate whether it would be to the manufacturer’s advantage to use the median or the mean.

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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 02:27 AM

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The following table shows the lifetimes, to the nearest 10 days, of a certain brand of light

Question:

Lifetime (days) 90-100 110-120 130-140 150–160 170–190 200–220 230-260 No. light bulbs (f) 12 28 54 63 41 16

Step by Step Answer:

a To represent the data in a cumulative frequency graph using upper class boundaries we first need t...View the full answer

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

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