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Confidence Levels Allow the Researcher to Have Some Idea of How

Question 3

Multiple Choice

Confidence levels allow the researcher to have some idea of how closely their samples reflect the parameter.Which of the following statements about confidence levels is true?

A) If a simple random sample is used, probability theory suggests that researchers can be 95 percent sure the estimates of that sample fall within one standard error of the parameter.
B) If a simple random sample is used, probability theory suggests that researchers can be 68 percent sure that estimates of that sample fall within two standard errors of the parameter.
C) If a simple random sample is used, probability theory suggests that researchers can almost be positive (99+ percent) that estimates of that sample fall within three standard errors of the true value.
D) If a simple random sample is used, probability theory suggests that researchers can be positive that sample mean is equivalent to population mean.

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