# How Lift Is Calculated

The lift equation states that lift L is equal to the lift coefficient Cl times the density r times half of the velocity V squared times the wing area A. For given air conditions, shape, and inclination of the object, we have to determine a value for Cl to determine the lift.

## What is lift ratio

Lift is simply the ratio of these values: target response divided by average response.

Mathematically, For example, suppose a population has an average response rate of 5%, but a certain model (or rule) has identified a segment with a response rate of 20%.

Then that segment would have a lift of 4.0 (20%/5%).

## What is XL miner

XLMiner has data mining software tools for business analytics, predictive model creation and testing.

XLMiner draws data from Excel workbooks, SQL databases or PowerPivot.

## What is Apriori property

The Apriori property is the property showing that values of evaluation criteria of sequential patterns are smaller than or equal to those of their sequential subpatterns.

## What does lift value mean

Hence, Lift is a value that gives us information about the increase in probability of the then (consequent) given the if (antecedent) part.

A lift ratio larger than 1.0 implies that the relationship between the antecedent and the consequent is more significant than would be expected if the two sets were independent.

## What is a frequent itemset

Definition. Frequent itemsets (Agrawal et al., 1993, 1996) are a form of frequent pattern.

Given examples that are sets of items and a minimum frequency, any set of items that occurs at least in the minimum number of examples is a frequent itemset.

## What is a good lift value

A lift value greater than 1 indicates that the rule body and the rule head appear more often together than expected, this means that the occurrence of the rule body has a positive effect on the occurrence of the rule head.

## What is a two way lift

A two-way product lift therefore is simply a lift involving two products and can easily be computed in Excel.

It can be generalized to situations involving the computation of lifts involving more than two items or other transaction attributes (such as day of week).

## What is confidence rule

Confidence in a rule is calculated by dividing the probability of the items occurring together by the probability of the occurrence of the antecedent.

For example, if B (antecedent) is present, what is the chance that C (consequent) will also be present?

## What is minimum support count

Minimum support count is the % of the all transaction. suppose you have 60% support count and 5 is the total transaction then in number the min_support will be 5*60/100=3.

## What if lift is less than 1

A lift smaller than 1 indicates that the rule body and the rule head appear less often together than expected, this means that the occurrence of the rule body has a negative effect on the occurrence of the rule head.

## What is confidence and support

Support is an indication of how frequently the items appear in the data. Confidence indicates the number of times the if-then statements are found true.

A third metric, called lift, can be used to compare confidence with expected confidence, or how many times an if-then statement is expected to be found true.

## Can an elevator open on both sides

A. Yes, you have several options, enter exit same side, opposite sides or 90 degree openings.

You can have the elevator open at different sides of the at each landing.

## What is support confidence and lift

For rule 1: Support says that 67% of customers purchased milk and cheese. Confidence is that 100% of the customers that bought milk also bought cheese.

Lift represents the 28% increase in expectation that someone will buy cheese, when we know that they bought milk.

This is the conditional probability.

## What does it mean if lift is 1

A lift value near 1 indicates that the rule body and the rule head appear almost as often together as expected, this means that the occurrence of the rule body has almost no effect on the occurrence of the rule head.