1. A normal distributionhas a meanof 50 and a standard deviationof 4. Determine the value below which 95 percent of the observations will occur.
2. A normal distribution has a mean of 60 and a standard deviation of 12. You select a random sampleof 9. Compute the probabilitythe sample mean is:
A. Greater than 63
B. Less than 56
C. Between 56 and 63
If you could show in an excel spreadsheet format with explanation.
Excel spreadsheet attached shows how to find the value below which certain observations will occur in a normal distribution.