If a Normally Distributed Group of Test Scores Have a Mean

question 52

Multiple Choice

If a normally distributed group of test scores have a mean of 70 and a standard deviation of 12, find the percentage of scores that will fall below 50.

• A) 4.75%
• B) 45.25%
• C) 6.75%
• D) 35.54%

---

Definitions:

Service Life

The period during which an object or equipment is expected to perform effectively and reliably before it needs to be replaced.

Compressor Inlet Restriction

A condition where the airflow into a compressor is impeded, leading to reduced performance and potential damage.

Unloader Circuit

A hydraulic or pneumatic circuit component designed to relieve pressure or unload the pump of its load when reaching a preset value.

Air Dryer Purge Valve

A component within an air dryer system that releases air and moisture from the system to prevent water build-up and maintain effective operation.