What Is the Approximate Width of an 80 Percent Confidence

question 45

Multiple Choice

What is the approximate width of an 80 percent confidence interval for the true population proportion if there are 12 successes in a sample of 80?

• A)± .078
• B)± .066
• C)± .051
• D)± .094

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Definitions:

Minnesota Twin Project

A research study that examines the psychological and behavioral differences between twins, particularly focusing on the effects of genetics vs. environment.

Monozygotic Twins

Identical twins that develop from a single fertilized egg, sharing the same genetics.

Dizygotic Twins

Twins that develop from two different eggs fertilized by two different sperm, also known as fraternal twins.

Shared Environment

The environmental factors that contribute to the similarities in development and behavior of individuals raised in the same household.