What is a consistency index?
Consistency Index (CI)- This is a measure of how well an individual character fits on a phylogenetic tree. It is calculated by dividing the minimum possible number of steps by the observed number of steps.
How is consistency index calculated example?
The Consistency Index for a matrix is calculated from (λmax-n)/(n-1) and, since n=4 for this matrix, the CI is 0.060.
What is the value of consistency index?
We represent consistency index by IC and it is defined as the ratio of the difference between the liquid limit and the natural water content of the soil to its plasticity index. We write it mathematically as this. We know plasticity index of a soil is difference between its liquid limit and plastic limit.
How do you calculate consistency index?
Quick Reference In cladistic analysis, a measure of homoplasy in a phylogenetic tree (or cladogram), calculated as the number of steps (i.e. character state changes) in the cladogram divided by the smallest possible number of steps. The index therefore runs from 0 to 1.
What is consistency index and liquidity index?
We must note here that Liquidity index is used for the same purpose as the consistency index that is to scale the water content of the soil. Consistency index and liquidity index are related to each other as sum of Liquidity index and consistency index will always be equal to 1.
How do you find consistency in statistics?
A simple test of consistency is that all frequencies should be positive. If any frequency is negative, it means that there is inconsistency in the sample data. If the data is consistent, all the ultimate class frequencies will be positive.
What is the toughness index?
Toughness index is defined as the ratio of plasticity index (IP) of the soil to the flow index (IF) of the soil. This gives us an idea of shear strength of soil at its plastic limit. When toughness index is less than 1, the soil is said to be friable, which means it can be easily crushed at the plastic limit.
What is consistency index with formula?
CI is defined as(2)CI=λmax−nn−1where λmax is the largest eigenvalue of the matrix and n is the number of factors (n=6 in present case).
What are the different consistency indices?
Consistency Index (Ic) /Relative consistency. Liquidity Index (IL) /Water Plasticity Ratio. Toughness Index (IT).
What is consistency index of fluids?
The consistency index parameter (K) gives an idea of the viscosity of the fluid. However, to. be able to compare K-values for different fluids they should have similar flow behaviour. index (n).
Can a consistency index be greater than 1?
consistency index In cladistic analysis, a measure of homoplasy in a phylogenetic tree (or cladogram), calculated as the number of steps (i.e. character state changes) in the cladogram divided by the smallest possible number of steps. The index therefore runs from 0 to 1.
Which is the best definition of the consistency index?
CONSISTENCY INDEX :- (Ic,CI) – Soil indicate hearness of water control of soil to its plastic limit. – Ic is zero at liquid limit. – Ic is 100% When soil is relatively strong, as it is in semi solid stage. – It is also known as relative consistency.
Which is the consistency index of a soil?
CONSISTENCY INDEX :- (Ic,CI) – Soil indicate hearness of water control of soil to its plastic limit. – Ic is zero at liquid limit. – Ic is 100% When soil is relatively strong, as it is in semi solid stage.
What is the consistency index of power law?
A 10.5-ppg Power Law fluid with a consistency index of 20 cp equivalent and flow behavior index of 0.8 is circulating at 250 gpm in an 8-¾-in-diameter wellbore. Determine the flow regime inside a 4½-in OD, 16.60-lb/ft drill pipe (3.826-in ID), and in the drill pipe/hole annulus.
How is the consistency index of a cladogram calculated?
In cladistic analysis, a measure of homoplasy in a phylogenetic tree (or cladogram), calculated as the number of steps (i.e. character state changes) in the cladogram divided by the smallest possible number of steps. The index therefore runs from 0 to 1. A low consistency index (less than 0.5) tends to indicate that much homoplasy has occurred.