If a Test That Has Reliability R Is Lengthened by a Factor

question 4

Multiple Choice

If a test that has reliability r is lengthened by a factor , the reliability R of the new test is given by ​ ​
​If the reliability is r = 0.6, the equation becomes . When the test length is unchanged, the reliability r = R(1) = 0.6. If the length of the test is doubled, the reliability r = R(2) . What percent improvement is there in the reliability when the test length is doubled?
​

• A)20.0%
• B)25.0%
• C)80.0%
• D)75.0%
• E)15.0%

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Definitions:

Profit-Maximizing

A strategy or process whereby a firm adjusts its production and pricing to achieve the highest possible profit.

Linear Demand Curve

A linear demand curve depicts a direct, inverse relationship between the price of a product and the quantity demanded, represented graphically as a straight line.

Inelastic Portion

A segment of the demand curve where consumers are less sensitive to price changes, implying that the quantity demanded changes only slightly in response to large changes in price.

Elastic Portion

The segment of a demand or supply curve where a change in price leads to a more than proportional change in quantity demanded or supplied.