Completion Time (From Start to Finish)of a Building Remodeling Project

question 69

Multiple Choice

Completion time (from start to finish) of a building remodeling project is normally distributed with a mean of 200 work-days and a standard deviation of 10 work-days.To be 99% sure that we will not be late in completing the project, we should request a completion time of _______ work-days.

• A)211
• B)207
• C)223
• D)200
• E)250

---

Definitions:

Confidence Coefficient

The probability level, associated with a confidence interval, that the true parameter lies within the interval.

Interval Estimation Procedure

A method of estimating the range of values where a population parameter lies, based on sample statistics.

Population Parameter

A numerical value that summarizes an aspect of a population, such as its mean, variance, or standard deviation.

α

It represents the significance level in hypothesis testing, usually indicating the probability of rejecting a true null hypothesis or the type I error rate.