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Question: Suppose the annual employer 401(k) cost per participant is normally distributed with a standard deviation of $625, but the mean is unknown.
a. If 73.89% of such costs are greater than $1,700, what is the mean annual employer 401(k) cost per participant?
b. Suppose the mean annual employer 401(k) cost per participant is $2,258 and the standard deviation is $625. If such costs are normally distributed, 31.56% of the costs are greater than what value?
What is the formula for converting z-scores to percentiles? I want to build a tool in Excel so i can get percentiles from test scores on normally distributed psychometric tests.
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a trader is designing his investment portfolio. he has prepared a list of potential companies in which to purchase
1.using your own words what is statistical variability? why is it important for researchers to understand the
Calculate the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year. Identify the median age of the uninsured senior citizens
An analyst wanted to fit the regression model i = 1, ... , n, by the method of least squares when it is known that ß2 = 4. How can the analyst obtain the desired fit by using a multiple regression computer program?
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Women's heights average 61 inches with a standard deviation of 2.8 inches in a certain study. Use the 68-95-99.7 rule to determine the typical ranges of the women's heights. In what range will approximately the middle 95% of the women's heights li..
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