A Consumer Advocacy Group Tested the "On-Air" Lifetimes of a Random

question 20

Multiple Choice

A consumer advocacy group tested the "on-air" lifetimes of a random sample of 162 cell phone batteries. The mean lifetime was 2.9 hours with a standard deviation of 0.4 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with lifetimes between 2.1 hours and 3.7 hours.

• A)110
• B)8
• C)almost all (greater than 154)
• D)154

---

Definitions:

No-lift Policy

A workplace strategy to prevent injuries by avoiding manual patient lifting, using equipment or assistive devices instead.

Mechanical Lifts

Devices used to assist in the lifting and moving of individuals or heavy loads, often utilized in healthcare settings to prevent injury.

Fibrous Tissue

A type of connective tissue composed mainly of collagen fibers, providing structural support and strength to organs and body structures.

Sporting Accident

An unexpected and unfortunate incident that occurs during sports activities, potentially leading to injuries.