A 99% confidence interval estimate of the population mean ? can be interpreted to mean:
a. if all possible sample are taken and confidence intervals created, 99% of them would include the true population mean somewhere within their interval.
b. we have 99% confidence that we have selected a sample whose interval does include the population mean.
c. we estimate that the population mean falls between the lower and upper confidence limits, and this type of estimator is correct 99% of the time.
d. All of these choices are true.
D
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