Use the 68-95-99

question 13

Multiple Choice

Use the 68-95-99.7 Rule to find probabilities or cutoff values.
-Based on data collected from its production processes, Crosstiles Inc. determines that
The breaking strength of its most popular porcelain tile is normally distributed with a
Mean of 400 pounds per square inch and a standard deviation of 12.5 pounds per square
Inch. Based on the 68-95-99.7 Rule, about what percent of its popular porcelain tile will
Have breaking strengths greater than 412.5 pounds per square inch?

• A) 95%
• B) 68%
• C) 16%
• D) 32%
• E) 47.5%

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Inflation

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