A Consumer Protection Agency Is Comparing the Work of Two $n _ { 1 } = n _ { 2 } = 12$

question 28

Essay

A consumer protection agency is comparing the work of two electrical contractors. The agency plans to inspect residences in which each of these contractors has done the wiring in order to estimate the difference in the proportions of residences that are electrically deficient. Suppose the proportions of residences with deficient work are expected to be about .6 for both contractors. How many homes should be sampled in order to estimate the difference in proportions using a 95% confidence interval of width .8? A) $n _ { 1 } = n _ { 2 } = 12$
B) $n _ { 1 } = n _ { 2 } = 29$
C) $n _ { 1 } = n _ { 2 } = 24$
D) $n _ { 1 } = n _ { 2 } = 6$

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Definitions:

Accommodation

Changes in existing ways of thinking that occur in response to encounters with new stimuli or events.

Schema

A cognitive framework or concept that helps organize and interpret information, based on experience, to make sense of the world.

Assimilation

The cognitive process of fitting new information into pre-existing cognitive schemas, perceptions, and understanding.

Circular Reaction

A repetitive action that achieves a desired outcome, often seen in the developmental stages of infants as they learn to interact with their environment.