The mean hourly wage for females is given to be $27.83 with a standard deviation of $4.10. Both values are representative of the population, but we are to determine P(26.83 s x $ 28.83) for a sample of 90 female graduates. Since we are dealing with the probability for a sample mean x instead of a particular value of x, the calculation for z will now account for the sample mean x and standard error o-. x - H X - H Find the z value corresponding to x - 26.83, rounding the result to two decimal places. x - H 2 = 26.83 - 27.83 90 Find the z value corresponding to x = 28.83, rounding the result to two decimal places. X - H 83 - 27.83 /90