Porcelain tile is often recommended over ceramic tile because its breaking strength tends to be higher therefore making it more
durable and long lasting. 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 describe the breaking
strength of the weakest 2.5% of its popular porcelain tile?