of the industry. For example‚ software storage applications may act as substitutes for hardware storage devices. If the substitute product presents a value proposal‚ which is distinctively dissimilar to‚ the current offers in the industry‚ the threat of the substitute is said to be high. It is however said to be lower when the substitute is a poorer performance product. Customers are less likely to shift from Data Tech if substitute products are of lesser quality. Tech Data Corporation can deal with
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mmTASK 1 a) Explain the following types of data communication networks and their applications * Public switched telephone network (PSTN) * Local area networks (LANs) * Metropolitan area networks (MANs) * Wide area networks (WANs) * Packet switched data network (PSDN)‚ * Integrated services digital network (ISDN) Public switched telephone network (PSTN) Public Switched telephone network (PSTN) is the global collection of interconnects originally designed to
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The Shampoo Data Set This data set is generated by a study of Brand X shampoo. It contains two measurements of customer satisfaction (on a scale from 0 to 100) with a shampoo sample. The customer satisfaction measurements were taken from 10 men and 10 women at two separate times. The first measurement is taken before the presentation of an advertising campaign‚ and the second measurement is taken after the campaign. The last column contains a dichotomous measure of purchase intentions. Each
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Data Collection Methods OBSERVATIONS Observation is a primary method of collecting data by human‚ mechanical‚ electrical or electronics means with direct or indirect contact. As per Langley P‚ “Observations involve looking and listening very carefully. We all watch other people sometimes but we do not usually watch them in order to discover particular information about their behavior. This is what observation in social science involves.” Observation is the main source of information in the
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Digital Transmission of Digital Data Digital Transmission of Digital Data Digital Data -- can be represented electronically(by sequences of specified voltage levels) or optically Digital Transmission -- sending of information over a physical communications media in the form of digital signals. Page 2 Digital Transmission of Digital Data Computers produce binary data Standards needed to ensure both sender and receiver understands this data Codes: digital combinations
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Lecture 1 1.1 INTRODUCTION Data structure is the branch of computer science that unleashes the knowledge of how the data should be organized‚ how the flow of data should be controlled and how a data structure should be designed and implemented to reduce the complexity and increase the efficiency of the algorithm. The theory of structures not only introduces the data structures‚ but also helps to understand and use the concept of abstraction‚ analyze problems step by step and develop algorithms to
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William. J.‚ & Li‚ Yuan. (2010). The infological equation extended: towards conceptual clarity in the relationship between data‚ information and knowledge. European Journal of Information Systems‚ 2010(19)‚ 409-421. doi:10.1057/ejis.2010.25; published online 11 May 2010 Purpose (What are the objectives for writing the paper?): Provide a clear distinction between data‚ information and knowledge as it relates to information systems (IS) and the implications for IS related research. Several
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CHAPTER 2 DATA COLLECTION AND PRESENTATION 2.1 Data Collection This section aims to: 1. Identify‚ compare and contrast the different types of data; 2. List and explain the various techniques of selecting a sample; and 3. Enumerate and illustrate the different sampling techniques Types of Data Data is a collection of facts‚ such as values or measurements. It can be numbers‚ words‚ measurements‚ observations or even just descriptions of things. Two types of Data Primary Data means original
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ARSHAD 2 OUTLINE DBMS DATA MINING APPLICATIONS RELATIONSHIP 3 DATA BASE MANAGEMENT SYSTEM A complete system used for managing digital databases that allow storage of data‚ maintenance of data and searching data. 4 DATA MINING Also known as Knowledge discovery in databases (KDD). Data mining consists of techniques to find out hidden pattern or unknown information within a large amount of raw data. 5 EXAMPLE An example to make it more clear: A grocery
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the stock prices by using trends‚ patterns‚ moving averages observed from historical data. However‚ there have been a certain number of people criticizing the use of past data. Among these people‚ a French mathematician‚ Louis Bachelier raised a theory called Efficient Market Hypothesis more than a century ago. The theory states that stock prices follow a random walk‚ which discouraged the study of historical data. This is very controversial and has led to an ever lasting dispute about the reliability
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