Question 1181537: The average monthly income of the employees of fashion head incorporated was computed to be equal to 5,500 with a standard deviation of 550. There are 900 employees in that company. Assume the normality of distribution. How many employees receiving a monthly income of above 5,500?
Answer by ikleyn(52750)   (Show Source):
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The average monthly income of the employees of fashion head incorporated was computed t
o be equal to 5,500 with a standard deviation of 550. There are 900 employees in that company.
Assume the normality of distribution. How many employees receiving a monthly income of above 5,500?
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If the distribution is normal, then the number of employees receiving the monthly income
above the mean is the same as the number of employees receiving the monthly income
below the mean, due to the symmetry of the curve.
So, half of 900 employees, i.e. 900/2 = 450 receive a monthly income above 5,500.
The given info about the standard deviation value is irrelevant and excessive.
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