freebitco.in

  

Central Tendency

Central tendencies are estimates of the most probable value of a given distribution. There are many different ways to compute the central tendency of a given distribution. The choice of the right central tendency depends mainly on the scale level of the measurements.


Arithmetic Mean

The arithmetic mean is most commonly used to designate the central tendency of a given distribution.

Requirements:

The individual measures must be at least interval scaled.

Calculation:

arithmetic mean

in words:
The arithmetic mean is the sum of all observed values divided by the number of observed values.


Median

The median describes the 50 % point of a given distribution.

Requirements:

The individual measures must be at least ordinal (rank-order) scaled.

Calculation:

All measures are brought into a rank order from the smallest to the largest. If the number of measures N is even:

median even

If the number of measures N is odd:

median odd


Mode

The Mode is the value which has the largest observed frequency. It is possible that there are more than one mode.

Requirements:

No requirements. The mode is also applicable to nominal scaled values.


 
crypto-games.net

Geometric Mean

Geometric mean is used for instance to calculate average growth rate.

Requirements:

All individual measures must be positive and at least ratio scaled.

Calculation:

geometric mean

in words:
The geometric mean ist the n-th root of the product of all individual measures.


Harmonic Mean

The harmonic mean is used when the individual measures designate sort of indices, for example miles per hour, dollars per week, inhabitants per square mile…

Requirements:

The individual measures must be positive and at least interval scaled

Calculation:

harmonic mean


Weighted Mean

Sometimes it is useful to average the means of one criterion collected from several samples. The weighted mean is the mean of the sample means.

Calculation:

weighted mean

whereas:

k = number of samples
nj = size of sample j
sample size= AM of sample j


 

Gallery

 
TrueFlip.io
 
freebitco.in
 
map kinase
 

PayPal Donation

BTC Donate Bitcoins (BTC)

Bitcoin Address:

135yCcKRytzCkCMb8vnTFq2rJFcq6R2rAR

 

ETH Donate Ethereum (ETH)

Ethereum Address:

0x8570825cD83c345a94070BD0fbccd93f97c67635

 

LTC Donate Litecoins (LTC)

Litecoin Address:

LT8ZCxGSGEsAzgpfn34ik1znH1FSWuQbyD

 

GRC Donate Gridcoins (GRC)

Gridcoin Address:

S4isByEbRy6i9Kd3NfHbwrEob7gahYsdBA