Chapter 3 Data Description 3-1 Measures of Central Tendency ( page 3-3) Measures found using data values from the entire population are called: parameter Measures found using data values from samples are called: statistic A parameter is a characteristic or measure obtained using data values from a specific population. A statistic is a characteristic or measure obtained using data values from a specific sample. The Measures of Central Tendency are: • The Mean • The
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Data Acquisition and Interfacing Lecture 09 Introduction A data acquisition system consists of many components that are integrated to: • Sense physical variables (use of transducers) • Condition the electrical signal to make it readable by an A/D board • Convert the signal into a digital format acceptable by a computer • Process‚ analyze‚ store‚ and display the acquired data with the help of software Data Acquisition System Block Diagram Flow of information in DAQ 1. 2.
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5 reasons to use social CRM for support and services By David Taber July 19‚ 2012 11:57 AM ET 2 Comments . CIO - So this article may come as something of a surprise‚ as I’m going to be beating the drums about social CRM again‚ this time for the service and support organization. Why? Social networks give you the quickest access to customers where they already are. Almost anybody you want to do business with is somewhere on Facebook or LinkedIn or product-review networks‚ at least in the United
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and Kimball’s definition of Data Warehousing. Bill Inmon advocates a top-down development approach that adapts traditional relational database tools to the development needs of an enterprise wide data warehouse. From this enterprise wide data store‚ individual departmental databases are developed to serve most decision support needs. Ralph Kimball‚ on the other hand‚ suggests a bottom-up approach that uses dimensional modeling‚ a data modeling approach unique to data warehousing. Rather than building
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group or individual can also be used against such groups or individuals. Industrial espionage among highly competitive businesses often requires that extensive security measures be put into place. And‚ those who wish to exercise their personal freedom‚ outside of the oppressive nature of governments‚ may also wish to encrypt certain information to avoid suffering the penalties of going against the wishes of those who attempt to control. Still‚ the methods of data encryption and decryption are relatively
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Data Input‚ Output‚ Storage and Access Methods The purpose of this paper is to highlight some best practices for data input and output. In addition‚ this paper will highlight appropriate uses of various storage means. Lastly‚ it will address the effect certain components of a computer have on its overall speed. Accuracy of Data Input There are various methods for entering data into a computer system. Depending on the medium in which the original data is contained‚ and how it is to be stored
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Data migration • Data migration is the process of transferring data between storage types‚ formats‚ or computer systems. • Data migration is usually performed programmatically to achieve an automated migration‚ freeing up human resources from tedious tasks. • It is required when organizations or individuals change computer systems or upgrade to new systems. • To achieve an effective data migration procedure‚ data on the old system is mapped to the new system providing a design
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environmental hazards has become very important. Human beings have been interested in ecology since the beginning of civilization. Even our ancient scriptures have emphasized about practices and values of environmental conservation. It is now even more critical than ever before for mankind as a whole to have a clear understanding of environmental concerns and to follow sustainable development practices. India is rich in biodiversity which provides various resources for people. It is also basis for
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CHAPTER 17 DATA MODELING AND DATABASE DESIGN SUGGESTED ANSWERS TO DISCUSSION QUESTIONS 17.1 Why is it not necessary to model activities such as entering information about customers or suppliers‚ mailing invoices to customers‚ and recording invoices received from suppliers as events in an REA diagram? The REA data model is used to develop databases that can meet both transaction
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1. Data mart definition A data mart is the access layer of the data warehouse environment that is used to get data out to the users. The data mart is a subset of the data warehouse that is usually oriented to a specific business line or team. Data marts are small slices of the data warehouse. Whereas data warehouses have an enterprise-wide depth‚ the information in data marts pertains to a single department. In some deployments‚ each department or business unit is considered the owner of its data
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