In a Normal Distribution, It Is Known That 27

question 25

Short Answer

In a normal distribution, it is known that 27.34% of all the items are included from 100 up to the mean, and another 45.99% of all the items are included from the mean up to 145. Determine the mean and the standard deviation of the distribution.

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Definitions:

R&D Expenditures

Research and Development expenditures are costs incurred in the process of discovering, developing, and enhancing products, technologies or services.

Engine-Oil Additive

A substance added to engine oil to improve its properties, such as reducing friction, wear, or corrosion, and enhancing performance.

Sunk Cost

A cost that has already been incurred and cannot be removed and therefore should not be considered in an investment decision.

Straight-Line Depreciation

A method of allocating an asset's cost evenly over its useful life, resulting in a consistent depreciation expense each year.