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datamining
Data Mining
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43 followers study24x7 01 Feb 2019 12:11 PM study24x7 study24x7

Four stages of data mining :
Data Sources
Data Exploration
Modeling
Deploying Models

Four stages of data mining : <br>Data Sources<br>Data...
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43 followers study24x7 01 Feb 2019 12:05 PM study24x7 study24x7

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43 followers study24x7 15 Jan 2019 11:19 AM study24x7 study24x7

How data mining is useful for Analytics Websites ? There are different analytics websites which will compare the prices of different things from other website. The Analytics and data mining plays big role in that websites. If you check the website named Trivago which will gives the information of different hotel prices by comparing the different websites uses the predictive data mining technique which will mine the data from different websites and shows the results. #datamining #usecases #complexsql

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43 followers study24x7 15 Jan 2019 11:17 AM study24x7 study24x7

How data mining is useful for mobile service providers ? The Mobile service providers uses huge data mining to collect customer data.Mobile phone and utilities companies use Data Mining and Business Intelligence to predict ‘churn’, the terms they use for when a customer leaves their company to get their phone/gas/broadband from another provider. They collate billing information, customer services interactions, website visits and other metrics to give each customer a probability score, then target offers and incentives to customers whom they perceive to be at a higher risk of churning.

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43 followers study24x7 15 Jan 2019 11:16 AM study24x7 study24x7

What is difference between data warehouse and data mining? Data Warehousing: It is a process where the data is extracted from various sources. Further, the data is cleansed and stored. Data Mining: It is a process where it explores the data using the queries.Basically, the queries are used to explore a particular data set and examine the results. This will help the individual in reporting, strategy planning, visualizing meaningful data sets.

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43 followers study24x7 15 Jan 2019 11:15 AM study24x7 study24x7

What Are Cubes? A data cube stores data in a summarized version which helps in a faster analysis of data. The data is stored in such a way that it allows reporting easily.

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43 followers study24x7 14 Jan 2019 10:56 AM study24x7 study24x7

What do you mean by Cluster Analysis? Cluster analysis is an important human activity . Cluster analysis has been widely used in numerous application , including market research, pattern recognition, data analysis and image processing.

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43 followers study24x7 14 Jan 2019 10:55 AM study24x7 study24x7

What do you mean by Analytical characterization? Data mining has proved to be an effective means of integrating the analyzing the diverse collection of variables. If the mined concept descriptions involve many attribute, an analytical characterization should be performed.

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43 followers study24x7 14 Jan 2019 10:54 AM study24x7 study24x7

What is Data Aggregation and Generalization? Aggregation is the technique wherein, as the name suggest, summary or aggregation operation are applied to the data for example, we can construct a data cube for analysis of the data at multiple granularity. Generalizing the data basically deals with the concept wherein low level or primitive data is replaced by high level concept.

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43 followers study24x7 12 Jan 2019 05:31 PM study24x7 study24x7

What is Data Transformation ? It consist of following tasks : Generalization - concept hierarchy climbing, Attribute/feature construction - New attributes are constructed and added to the tuple, Normalization - scaled to fall within a small, specified range

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43 followers study24x7 12 Jan 2019 05:30 PM study24x7 study24x7

Explain Data reduction ? It consists of following three tasks - Dimensionality reduction - Attribute subset selection, Numerosity reduction - Tuple subset selection, Discretization - Reduce the cardinality of active domain.

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43 followers study24x7 12 Jan 2019 05:29 PM study24x7 study24x7

What is Data cleaning ? Causes of Dirty Data : Missing values, Noisy data (Human/Machine Errors), Inconsistent data

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43 followers study24x7 12 Jan 2019 05:29 PM study24x7 study24x7

What do you mean by preprocessing of data in data mining ? A Before data is mined it has to be preprocessed. It consists of following three stages :
Data cleaning - Real world data is dirty so need to be cleaned
Data reduction- Remove data not useful for mining
Data transformation - Syntactic transformation

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43 followers study24x7 12 Jan 2019 05:28 PM study24x7 study24x7

What is difference between OLAP and data mining ? A OLAP - (On-line Analytical Processing )provides you with a very good view of what is happening, but can not predict what will happen in the future or why it is happening where as data mining is group of techniques that find relationships that have not previously been discovered.

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43 followers study24x7 09 Jan 2019 10:39 AM study24x7 study24x7

Different types of Storage models in OLAP?
1. MOLAP – Multidimensional Online Analytical Processing
2. ROLAP – Relational online Analytical processing
3. HOLAP – Hybrid online Analytical Processing
#datamining

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43 followers study24x7 09 Jan 2019 10:38 AM study24x7 study24x7

What is Data Mining? Data Mining is process of discovering the patterns in very large data sets involving the different methods like Machine Learning,statistics, different database systems. #datamining

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43 followers study24x7 09 Jan 2019 10:36 AM study24x7 study24x7

What are applications areas of data mining?
Weather forecasting.
E-commerce.
Self-driving cars.
Hazards of new medicine.
Space research.
Fraud detection.
Stock trade analysis.
Business forecasting.
Social networks.
Customers likelihood.

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43 followers study24x7 09 Jan 2019 10:34 AM study24x7 study24x7

What are techniques used for data mining?
Artificial neural networks
Decision trees
Genetic algorithms
#datamining

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43 followers study24x7 09 Jan 2019 10:33 AM study24x7 study24x7

What does subject-oriented data warehouse signify?
Basically, we use it to shows that the data warehouse stores the information around a particular subject. Such as product, customer, sales, etc.
#datamining

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43 followers study24x7 09 Jan 2019 10:31 AM study24x7 study24x7

What is Fact Table?
It contains the measurement of business processes. Also, foreign keys for the dimension tables.
#datamining

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