Use the Given Information to Find the Minimum Sample Size

question 124

Multiple Choice

Use the given information to find the minimum sample size required to estimate an unknown population mean µ.
-How many students must be randomly selected to estimate the mean weekly earnings of students at one college? We want 95% confidence that the sample mean is within $2 of the population mean, and the population standard deviation is known to be $10.

• A) 136
• B) 97
• C) 68
• D) 85

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Definitions:

William McDougall

A British psychologist and one of the founding figures of social psychology, known for his work on instinct and the social nature of human beings.

Instincts

are innate, typically fixed patterns of behavior in animals and humans that are responses to specific stimuli and serve survival and reproductive purposes.

Cognition

Refers to the mental processes involved in gaining knowledge and comprehension, including thinking, knowing, remembering, judging, and problem-solving.

Seligman

Refers to Martin Seligman, a psychologist known for his work on the theory of learned helplessness and for promoting positive psychology.