Q: The time that it takes a randomly selected job applicant to perform a certain

Question

Q: The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated by a normal distribution with a mean value of 120 seconds and a standard deviation of 20 seconds. The fastest 10% are to be given advanced training. What task times qualify individuals for such training? (Round the answer to one decimal place.) Explain how you would mark and shade your normal distribution curve. Where do you set up your lines? Where do you shade? Do not use the table. Do not convert to z scores. Use this calculator. http://stattrek.com/online-calculator/normal.aspx

Explanation / Answer

In the calculator, type 120 and 20 corresponding to mean and standard deviation text box, and 0.10 corresponding to cumulative probbaility. This will give random variable value in top most text box. The answer is 94.369~94.4.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.