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

question 13

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 = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the probability of type II error is approximately ________.

• A)-0.65
• B)0.2422
• C)0.64
• D)0.7422
• E)0.2508

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Definitions:

Acquisition

The process by which one company purchases most or all of another company's shares or assets to gain control or ownership.

Merger

The combination of two or more companies into a single legal entity, often aiming to improve competitive positioning or expand market share.

Acquiring Firm

The company that purchases another company in a takeover or merger.

Acquired Firm

A company that has been purchased and absorbed by another entity.