MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:4. QUESTION
A precision instrument is guaranteed to be accurate within 2 units. A sample of four instrument readings on
the same object yielded the measurements
353 351 351 355.
4.1
Construct a 95% confidence interval for the variance of the instrument's precision
readings
4.2 It is believed that the variation in the instrument's precision readings is equal to 0.5.
From your confidence interval, is there sufficient evidence to conclude that the
variance differs from 0.5? Explain your answer
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