Question

Ophthalmologists require an instrument that can rapidly measure interocular pressure for glaucoma patients. The device now in general use is known to yield readings of this pressure with a variance of 10.3. The variance of five pressure readings on the same eye by a newly developed instrument is equal to 9.8.
Does this sample variance provide sufficient evidence to indicate that the new instrument is more reliable than the instrument currently in use? (Use α = .05.)


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  • CreatedMay 20, 2015
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