Question: confidence level 99.40 ? % critical value (za/2) ? 2.97 sample mean 91.30 ? standard error ? ? margin of error ? 31.48 73.70 ?

confidence level99.40? %
critical value (za/2)?2.97
sample mean91.30?
standard error??
margin of error?31.48
73.70?
upper limit?146.78

When constructing the confidence interval a population mean, assuming the population standard deviation is known, we use the following formula:

confidence level99.40? %critical value (za/2)?2.97sample mean91.30?standard error??margin of error?31.4873.70?upper limit?146.78When constructing the

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