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:

Net Cash

The amount of cash available after accounting for all cash inflows and outflows within a specific period.

Investing Activities

Financial actions related to the acquisition or sale of assets, such as securities and property, aimed at generating income or appreciation.

Net Cash

The distinction between a business's overall cash receipts and disbursements.

Financing Activities

Activities that result in changes in the size and composition of the equity capital or borrowings of the entity.