the z value needed to conduct a two tail test in a statistical inference problem, specifying a 90% level of confidence is 1.65
A confidence interval is based on the sample statistics and is used to estimate a population parameter.
For example, a sample mean is used to build a confidence interval to estimate the population mean.
the z value needed to conduct a two tail test in a statistical inference problem, specifying a 90% level of confidence is 1.65
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