StrugglingStudent

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Statistics

The gas mileage for a particular model car is known to have a standard deviation of
σ = 1.0
mile per gallon in repeated tests in a controlled laboratory environment at a fixed speed. For a fixed speed, gas mileages in repeated read more ..

StrugglingStudent Dec 20, 2016

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Help!

The prostate-specific antigen (PSA) test is a simple blood test to screen for prostate cancer. It has been used in men over 50 as a routine part of a physical exam, with levels above 4 ng/mL indicating possible prostate cancer. The test result is not always read more ..

StrugglingStudent Nov 11, 2016

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1167

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Benford's LAw

According to Benford's law, the probability that the first digit of the amount of a randomly chosen invoice is a 1 or a 2 is 0.477. You examine 77 invoices from a vendor and find that 25 have first digits 1 or 2. If Benford's law holds, the count of 1s read more ..

StrugglingStudent Nov 11, 2016