Answer: E.53
Explanation:
From the above information, the formula for due date is given below.
DUE DATE = Expected Completion Time + (Z * Standard Deviation)
A confidence level refers to the percentage of all possible samples that can be expected to contain the true population parameter. It is computed according to a random sample from the population and most times always associated with a certain confidence level that is a probability, usually presented as a percentage. The 90% says that 90% will include the true mean but 10% won't.
A Z-score is referred to as a numerical measurement that is made use of in statistics of a value's relationship to the mean (that is average) of a group of values, measured in terms of standard deviations away from the mean.
Expected time = 40
Confidence interval = 90 = Z VALUE of 1.282
Standard Deviation= 10
DUE DATE = 40 + (1.282 * 10) = 53days
= 40+ 12.82
=52.82
Approximately 53
Therefore,the time in days is 53 days.
