Question

The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual.

For a sample of n=65, find the probability of a sample mean being greater than 224 if u-223 and sd =5.5 is ? (round to 4 decimal places)

Would the given sample be unusual?

The sample mean (would/would not) be considered unusual because it (lies / does not lie) within the range of an unusual event namely with in (how many standard deviation) of the mean of the sample means.

What steps do I use on the TI84 to calculate this problem?

Answer 1