Question: A precision instrument is guaranteed to read accurately to within 2 units. A sample of four instrument readings on the same object yielded the measurements

A precision instrument is guaranteed to read accurately to within 2 units. A sample of four instrument readings on the same object yielded the measurements 353, 351, 351, and 355.
a. Test the null hypothesis that σ = .7 against the alternative σ > .7. Use α = .05.
b. Find a 90% confidence interval for the population variance.

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a The hypothesis of interest is H 0 7 versus H a 7 ... View full answer

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