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 not true?
a. if a simple random sample is used, probability theory suggests that researchers can be 68 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 95 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 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 allows the researcher to know with certainty that they have accurate data
Question 2
Which of the following statements is true concerning the relationship between standard error and sample size?
a. there is a positive relationship
b. there is an inverse relationship
c. as sample size decreases, the standard error decreases
d. as sample size increases, the standard error increases
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Opener A researcher examines an agarose gel