A Laptop Battery Lifespan Follows a Normal Distribution with Mean $\sigma$

question 4

Multiple Choice

A laptop battery lifespan follows a normal distribution with mean μ = 22 months and a standard deviation $\sigma$ =6 months.To test the alternative hypothesis that μ < 22 with α = .01,36 laptop batteries are randomly selected.Assuming that μ=24,the probability of type II error is approximately

• A)-.01
• B)2.33
• C)-4.33
• D)0.01
• E)0.00

---

Definitions:

Smooth Muscle

A type of muscle tissue which is non-striated, involuntary, and found within the walls of internal organs such as the stomach, intestines, and blood vessels.

Cardiac Muscle

Cardiac muscle is a specialized form of striated muscle found exclusively in the heart, characterized by interconnected cells that contract to pump blood throughout the body.

Contraction

The process of muscle fibers shortening and generating force, often resulting in movement of parts of the body.

Cardiac Muscle

A specialized form of striated muscle occurring in the hearts of vertebrates, responsible for its contraction.