The role of the sample mean 
in a confidence interval estimate for the population mean 
is to determine:
A) the sample size needed
B) the confidence coefficient 1 -
C) the margin of error in the estimate
D) all of these
E) none of these
Correct Answer:
Verified
Q112: If the population deviation Q113: After constructing a confidence interval estimate for Q114: A study conducted by the doctors of Q115: A random sample of 45 door-to-door encyclopedia Q116: A study conducted by a commuter train Q118: When estimating a population mean μ , Q119: In developing an interval estimate for a Q120: A random sample of 60 people revealed Q121: An unbiased estimator of a population parameter Q122: The sample standard deviation s is an
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