Reduced Mean when Frequency Factor and Standard Deviation are Considered Formula

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Reduced Mean, a function of sample size N in Gumbel's Extreme Value distribution. Check FAQs
yn=yT-(KzSn)
yn - Reduced Mean?yT - Reduced Variate 'Y' for Return Period?Kz - Frequency Factor?Sn - Reduced Standard Deviation?

Reduced Mean when Frequency Factor and Standard Deviation are Considered Example

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Here is how the Reduced Mean when Frequency Factor and Standard Deviation are Considered equation looks like with Values.

Here is how the Reduced Mean when Frequency Factor and Standard Deviation are Considered equation looks like with Units.

Here is how the Reduced Mean when Frequency Factor and Standard Deviation are Considered equation looks like.

0.58Edit=4.08Edit-(7Edit0.5Edit)
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Reduced Mean when Frequency Factor and Standard Deviation are Considered Solution

Follow our step by step solution on how to calculate Reduced Mean when Frequency Factor and Standard Deviation are Considered?

FIRST Step Consider the formula
yn=yT-(KzSn)
Next Step Substitute values of Variables
yn=4.08-(70.5)
Next Step Prepare to Evaluate
yn=4.08-(70.5)
LAST Step Evaluate
yn=0.58

Reduced Mean when Frequency Factor and Standard Deviation are Considered Formula Elements

Variables
Reduced Mean
Reduced Mean, a function of sample size N in Gumbel's Extreme Value distribution.
Symbol: yn
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Reduced Variate 'Y' for Return Period
Reduced Variate 'Y' for Return Period is a transformed variable allowed for Gumbel distribution used to model extreme values and return period T is expected years that a certain event will occur.
Symbol: yT
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Frequency Factor
Frequency Factor which varies between 5 to 30 according to rainfall duration is a function of recurrence interval (T) and the coefficient of skew (Cs).
Symbol: Kz
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Reduced Standard Deviation
Reduced Standard Deviation, a function of sample size N is a measure which shows how much variation from the mean exists in Gumbel's Distribution Table.
Symbol: Sn
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.

Other formulas in Gumbel's Method for Prediction of Flood's Peak category

​Go Reduced Variate 'Y' in Gumbel's Method
y=(1.285(xT-xm)σ)+0.577
​Go Reduced Variate concerning Return Period
yT=-(ln(ln(TrTr-1)))
​Go Reduced Variate 'Y' for given Return Period
yT=-(0.834+2.303log10(log10(TrTr-1)))
​Go Frequency Factor as applicable to Infinite Sample Size
Kz=yT-0.5771.2825

How to Evaluate Reduced Mean when Frequency Factor and Standard Deviation are Considered?

Reduced Mean when Frequency Factor and Standard Deviation are Considered evaluator uses Reduced Mean = Reduced Variate 'Y' for Return Period-(Frequency Factor*Reduced Standard Deviation) to evaluate the Reduced Mean, The Reduced Mean when Frequency Factor and Standard Deviation are Considered formula is defined as a dimensionless variable in Gumbel's method, the most widely used probability distribution function values for extreme hydrologic and meteorological studies for the prediction of flood peaks. Reduced Mean is denoted by yn symbol.

How to evaluate Reduced Mean when Frequency Factor and Standard Deviation are Considered using this online evaluator? To use this online evaluator for Reduced Mean when Frequency Factor and Standard Deviation are Considered, enter Reduced Variate 'Y' for Return Period (yT), Frequency Factor (Kz) & Reduced Standard Deviation (Sn) and hit the calculate button.

FAQs on Reduced Mean when Frequency Factor and Standard Deviation are Considered

What is the formula to find Reduced Mean when Frequency Factor and Standard Deviation are Considered?
The formula of Reduced Mean when Frequency Factor and Standard Deviation are Considered is expressed as Reduced Mean = Reduced Variate 'Y' for Return Period-(Frequency Factor*Reduced Standard Deviation). Here is an example- 0.58 = 4.08-(7*0.5).
How to calculate Reduced Mean when Frequency Factor and Standard Deviation are Considered?
With Reduced Variate 'Y' for Return Period (yT), Frequency Factor (Kz) & Reduced Standard Deviation (Sn) we can find Reduced Mean when Frequency Factor and Standard Deviation are Considered using the formula - Reduced Mean = Reduced Variate 'Y' for Return Period-(Frequency Factor*Reduced Standard Deviation).
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