A company manufactures right-angled brackets for use in the construction industry. A sample of brackets are measured,
Question:
A company manufactures right-angled brackets for use in the construction industry. A sample of brackets are measured, and the number of degrees by which their angles deviate from a right angle are summarised in the following table.
a. Draw a cumulative frequency polygon to illustrate these deviations.
b. Estimate the median and the interquartile range of the bracket angles, giving both answers correct to 1 decimal place.
c. A bracket is considered unsuitable for use if its angle deviates from a right angle by more than 1.2°. Estimate what percentage of this sample is unsuitable for use, giving your answer correct to the nearest integer.
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ANSWER To answer the given questions lets first create a cumulative frequency table based on the provided data Deviation from 90 d No brackets f Cumul...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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