Given a population mean of 78 and a standard error of the mean value of 2, what else do we need to use the formula to find the range of means that would be expected to occur 90% of the time?
A) The z-scores associated with the extreme high and low .1000 ends of the distribution.
B) The z-scores associated with the proportions between the mean and .1000.
C) The z-scores associated with extreme high and low .0500 ends of the distribution.
D) The z-scores associated with the proportion between the mean and .0500.

Question

Quizplus · Accepted Answer

To find the range of means that would be expected to occur 90% of the time, we need to use the 90% confidence interval, which is calculated using the z-score associated with the extreme high and low .0500 ends of the distribution. Therefore, we need the z-scores associated with the extreme high and low .0500 ends of the distribution.

Given a Population Mean of 78 and a Standard Error