Mean‚ Mode and Median Ungrouped and Grouped Data Ungrouped Data refers to raw data that has been ‘processed’; so as to determine frequencies. The data‚ along with the frequencies‚ are presented individually. Grouped Data refers to values that have been analysed and arranged into groups called ‘class’. The classes are based on intervals – the range of values – being used. It is from these classes‚ are upper and lower class boundaries found. Mean Mean The ‘Mean’ is the total of all the values
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DATA COMMUNICATION COEN 3193 Assignment No. 1 Brief History of Data Communication Submitted by: Camille A. Bonito BSCpE IV-2 Submitted to: Florinda H. Oquindo TIMELINE OF HISTORY OF DATA COMMUNICATION 1800 Telegraph defined from the Greek... TELE = Afar GRAPHOS = Write 1809 First telegraph in Bavaria. Samuel Soemmering. Used 35 wires with gold electrodes in water. Detection at distant end 2000 feet away was by the amount of gas caused by electrolysis. 1828 First telegraph in the USA
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Data Collection and Analysis Grid * Use the two articles assigned by your facilitator to identify the following data collection‚ analysis‚ and measurement elements for the studies. Limit each box to no more than three sentences. * * | * Qualitative | * Quantitative | * Data collection methods | * This qualitative study used a focus group interview as the main data collection method with a semi-structured design. | * The study employed an experimental pre-test/post-test
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Data Collection Methods III Questionnaires A questionnaire is a preformatted written set of questions to which respondents record their answers usually within rather closely defined alternatives. Questionnaires are an efficient data collection mechanism when the researcher knows exactly what is required and how to measure the variables of interest. Questionnaires can be administered personally‚ mailed to the respondents‚ or electronically distributed. Guidelines for Questionnaire Design
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Effective Data Management Strategies and Business Intelligence Tools Keiser University Dr. Thompson MBA 562 April 12‚ 2012 Introduction In today’s society‚ many individuals and companies use smaller and more powerful computing and communication devices. These devices have better connectivity when in both wired and wireless environments‚ and accepted standards for data transfer and presentation. These devices play a major role in the lives of individuals and companies
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Name:__Sanchia Campbell__________________________________________ Class: _HLT 362V___________________ Date: _7/20/2014_____________________________________________________________________________ EXERCISE 11 Questions to be Graded 1. What demographic variables were measured at least at the interval level of measurement? Age and Income‚ length of labor(hrs)‚ return to work (wk)‚ number of hours working per week. 2. What statistics were used to describe the length of labor in this study? Were
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Don’t forget to check out the Online Learning Center‚ www.mhhe.com/forouzan for additional resources! Instructors and students using Data Communications and Networking‚ Fourth Edition by Behrouz A. Forouzan will find a wide variety of resources available at the Online Learning Center‚ www.mhhe.comlforouzan Instructor Resources Instructors can access the following resources by contacting their McGraw-Hill Representative for a secure password. PowerPoint Slides. Contain figures‚ tables‚ highlighted
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Data Analysis and Decision Help Session 5 Fall 2013 P1 Chi-square Test Goodness of Fit A marketing company thinks that the proportion of people who prefer to get their news from different sources are the following: 25% from the TV‚ 43% from the Internet‚ 7% from the radio and 25% from the newspaper. In order to test their claim‚ they collect the following data: Source Internet Radio Newspaper Count TV 45 56 10 38 Can we be reasonably certain that their
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Data mining and warehousing and its importance in the organization Data Mining Data mining is the process of analyzing data from different perspectives and summarizing it into useful information - information that can be used to increase revenue‚ cuts costs‚ or both. Data mining software is one of a number of analytical tools for analyzing data. It allows users to analyze data from many different dimensions or angles‚ categorize it‚ and summarize the relationships identified. Technically‚ data
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channel. Each signal is assigned a different frequency (subchannel) within the main channel. * Useful bandwidth of medium exceeds required bandwidth of channel * e.g. broadcast radio and cable television * Channel allocated even if no data Frequency Division Multiplexing Diagram * Each signal is modulated to a different carrier frequency * Carrier frequencies separated by guard bands (unused bandwidth) – to prevent interference so signals do not overlap. 3 FDM System FDM
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