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willowcollins1256
06.10.2019 •
Mathematics
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 130 sec and a standard deviation of 25 sec. the fastest 10% are to be given advanced training. what task times qualify individuals for such training? (round the answer to one decimal place.)
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Ответ:
The task time for the fastest 10% should be greater than 161.9 seconds.
Step-by-step explanation:
Since it is given that:
Mean = 130 seconds
Standard Deviation = 25 seconds
The fastest of the 10% can be found by finding the area corresponding to the required normal distribution curve
Thus the Z value for the normal distribution curve for the given values of mean and deviation is
Z = 1.2796
Thus the value of score can be found from the equation
Applying values we get
Ответ:
Step-by-step explanation:
Area = l × b
= 9ft × 8ft
= 72ft²