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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Analysis of Data The researcher distributed 150 questionnaires to people and students from different schools. After collecting the papers‚ each was tallied one by one. The questionnaire has a total of Seven(7) questions each with a different set and amount of answers. One hundred(100) questionnaires were distributed in person while the Fifty(50) were answered online. The results of the survey will be explained by percentage and shown through pie chart as well along with a slight conclusion for
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Collecting and Representing Data During the past few lessons you have looked at ways of collecting and representing data. You will now put all of your knowledge together to complete these questions. Question 1: The information shown displays the colour of 30 cars in the school car park. Complete the tally chart below. Car Colour | Tally | Frequency (Total) | Green | | | Grey | | | Yellow | | | Red | | | Black | | | Blue | | | White | | | Question 2: Using
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1) A card is drawn from a standard deck of 52 playing cards. Find the probability that the card is an ace or a heart. 17 7 3 4 A) B) C) D) 52 52 13 13 Answer: D 2) The events A and B are mutually exclusive. If P(A) = 0.7 and P(B) = 0.2‚ what is P(A or B)? A) 0.5 B) 0.9 C) 0.14 D) 0 Answer: B 3) A coin is tossed. Find the probability that the result is heads. A) 1 B) 0.5 C) 0.1 Answer: B 4) Suppose you are using = 0.01 to test the claim that µ = 950 using a P-value. You are given the 1) 2)
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Conceptual Data Models for Database Design Database Design Process The database design process consists of a number of steps listed below. We will focus mainly on step 2‚ the conceptual database design‚ and the models used during this step. Step 1: Requirements Collection and Analysis ▪ Prospective users are interviewed to understand and document data requirements ▪ This step results in a concise set of user requirements‚ which should be detailed and complete. ▪ The functional
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02. Compare and contrast between the bus and star topology. A network architecture in which a set of clients are connected by a shared communications line‚ called as a bus. A network consists of one central switch‚ hub or computer which acts as a conduit to transmit messages‚ called as a star. Bus networks are the simplest way to connect multiple clients‚ but often have problems when two clients want to transmit at the same time on the same bus. The star topology is a computer
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prepare for a background check: Know what potential employer check before hiring..................... 1 27 May 2013 ii ProQuest Document 1 of 1 How to prepare for a background check: Know what potential employer check before hiring Author: Marcia Heroux Pounds Publication info: McClatchy - Tribune Business News [Washington] 11 Aug 2010. ProQuest document link Abstract: Credit checks are most often done on job applicants applying for positions in which they would handle cash or have access
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Chartered Institute of Personnel and Development Written Handout (Word Count: 668) Assignment submitted in part fulfillment of the requirement for the (3RAI) Core Unit – (3RAI)- Foundation Level Prepared By | Ahmed Malek | Programme Title | Recording‚ Analyzing‚ and Using HR Information | Assignment Title | 3RAI | CIPD Membership No. | | Personal Tutor | | Submission | 1st Attempt | Date of Submission | 9th May-2013 | “I declare that this assignment is the result
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DATABASES AND DATA WAREHOUSES Building Business Intelligence CONTACT INFORMATION: Stephen Haag is the primary author of this chapter. If you have any questions or comments‚ please direct them to him at shaag@du.edu. THIS CHAPTER/MODULE IN SHORT FORM… This chapter introduces your students to the vitally important role of information in an organization and the various technology tools (databases‚ DBMSs‚ data warehouses‚ and data-mining tools) that facilitate the management and organization of information
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2.1. DATA AND INFORMATION Data Data is the raw materials from which information is generated. Data are raw facts or observations typically about physical phenomena or business transactions. It appears in the form of text‚ number‚ figures or any combination of these. More specifically data are objective measurements of the attributes (the characteristics) of entities (such as people‚ places‚ things and events) According to Loudon and Loudon- “Streams of raw facts representing events
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