A topic of interest in ophthalmology is whether or not spherical refraction differs between the left and
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A topic of interest in ophthalmology is whether or not spherical refraction differs between the left and right eye on average. In a study to investigate this, refraction was measured on the left and right eye of 17 patients. The average of the differences (right - left) in diopters was -3.5 with a sample standard deviation of 7.5. Assuming normality, provide a 90% confidence interval for the average difference (right - left)
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Making Hard Decisions with decision tools
ISBN: 978-0538797573
3rd edition
Authors: Robert Clemen, Terence Reilly
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