Author Question: Confidence levels allow the researcher to have some idea of how closely their samples reflect the ... (Read 40 times)

EY67 · **on:** Aug 13, 2018

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