Ridge Counts on Fingerprints Are Approximately Normally Distributed, with a Mean

question 50

Multiple Choice

Ridge counts on fingerprints are approximately normally distributed, with a mean of about 140 and a standard deviation of 50. Which of the following intervals will contain 47.5% of the population?

• A)140 ± 50 ridges
• B)90 ± 100 ridges
• C)140 ± 100 ridges
• D)190 ± 50 ridges

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