Suppose That More Than a Decade Ago High Levels of Lead

question 45

Multiple Choice

Suppose that more than a decade ago high levels of lead in the blood put 78% of children at risk. A concerted effort was made to remove lead from the environment. Suppose, according to a survey, only 6% of children in the United States are at risk of high blood-lead levels. In a random sample of 150 children taken more than a decade ago, what is the probability that 105 or more had high blood-lead levels?

• A)0.963
• B)0.079
• C)1.000
• D)0.000

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Definitions:

Social Exchange Theory

A theoretical perspective that explains social change and stability as a process of negotiated exchanges between parties.

Nonverbal Communication

is the transmission of messages or signals through a non-linguistic means, such as facial expressions, body language, and gestures.

Social Behaviors

Actions that individuals take within and towards groups, often governed by social norms and influenced by the presence of others.

False Feedback

The provision of incorrect information or evaluation to individuals regarding their performance or abilities, often used in psychological experiments to assess reactions or behaviors.