Use the 68-95-99

question 20

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 between 375 and 425 pounds per square inch?

• A) 95%
• B) 68%
• C) 84%
• D) 32%
• E) 47.5%

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Definitions:

Older Adults

Individuals who are in the later stage of their life, typically signifying those who are age 65 and older.

Depressive Disorders

A group of conditions characterized by persistent feelings of sadness and hopelessness and a lack of interest or pleasure in activities, significantly affecting one’s daily life.

ECT

Electroconvulsive Therapy (ECT) is a psychiatric treatment involving electrically induced seizures to provide relief from severe mental disorders.

Older Adults

Individuals typically over the age of 65 years, often considered within the context of geriatric psychology and health.