Apply the 68-95-99.7 Rule to Answer the Question

question 9

Multiple Choice

Apply the 68-95-99.7 rule to answer the question.
-The annual precipitation for one city is normally distributed with a mean of 266 inches and a standard deviationof 2.5 inches. What percentage of years had precipitation between 261 inches and 271 inches?

• A)99.7%
• B)34%
• C)68%
• D)95%

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