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

question 17

Multiple Choice

A laptop battery lifespan follows a normal distribution with mean μ = 20 months and a standard deviation $\sigma$ = 6 months.To test the alternative hypothesis that μ > 20 with α = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the power of this is approximately ________.

• A)0.00
• B)0.2595
• C)0.2036
• D)0.6449
• E)0.7405

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Definitions:

Amortization

The process of gradually writing off the initial cost of an intangible asset over a period, reflecting its consumption, expiration, or obsolescence.

Depreciation Adjustment

A financial reporting mechanism to allocate the cost of a tangible asset over its useful life.

Intra-Entity Asset Transfers

Transactions involving the transfer of assets from one segment of an organization to another within the same entity.

Excess Amortizations

Amortization expenses that are higher than what is considered normal or expected, often due to aggressive repayment of debt or intangible assets.