question 3 consider the following statements concerning confidence int
Consider the following statements concerning confidence interval estimates:
A. If the confidence level is increased, then the sample size would also need to be increased, if the precision (width of confidence interval) is to be
B. For a given level of confidence, sample size and standard deviation, the width of a confidence interval for the mean will be the same regardless of
whether the standard deviation is a population or sample measure.
C. Where no prior information is available concerning an estimate of the true population proportion, a conservative estimate of the sample size
required to obtain a confidence interval with given levels of confidence and precision can be determined by letting the proportion equal 1/2.
O only A is true
O only A and B are true
O only A and C are true
O only B and C are true
O A, B and C are true
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