Use the standard normal distribution (aka z distribution where mu = 0 and sigma = 1) to determine the values of Z that will give you the middle 90% of the data. Note that each answer above requires TWO values of Z.
Use the standard normal distribution (aka z distribution where mu = 0 and sigma = 1) to determine the values of Z that will give you the middle 90% of the data.
Note that each answer above requires TWO values of Z.
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