Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? the standard normal equation can be applied as follows: z = startfraction left parenthesis due date minus expected date of completion right parenthesis over sigma subscript p endfraction , where z is the number of standard deviations the due date or target date lies from the mean or expected date and sigma subscript p is the project standard deviation, which is the square root of the variance. for the due date of 17 months, value of z based on the given information = negative 2.000 (round your response to two decimal places). using the standard normal table , the probability that the project will be completed in 17 months = nothing (round your response to four decimal places).