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:

Market For Soda

The commercial space in which various types and brands of soda (sugary, carbonated beverages) are bought, sold, and competed over.

Surplus

The situation in which the quantity supplied of a product exceeds the quantity demanded at the existing price.

Binding Rent-Control

A type of rent regulation where the set price ceilings are below the market equilibrium rent, leading to shortages and reduced quality of rental housing.

Transaction Costs

Expenses incurred in the process of making an economic exchange, including search, information, bargaining, decision, policing, and enforcement costs.