Question: Ophthalmologists require an instrument that can rapidly measure interocular pressure

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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