...Date File 1 Chapter One 1) Determine whether the evaluated group is a population or a sample a) Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease. Is this a population or a sample; explain your answer. The randomly selected group of 500 patients with high cholesterol is a population. 67% of that population has heart disease. It is considered a population because it is the entire group of patients that in which we are interested, and desire to draw a conclusion on heart health. The blood sample drawn to determine high cholesterol might be a sample under this study. b) An investigation of 150 randomly selected local restaurants concluded that 42% of local restaurants have serious health code violations. Is this a population or a sample; explain your answer. This is also a population. A population is an entire collection of people, animal, plants, or things from which we want to draw a conclusion. In this case, the things (restaurants) are the population which is being studied for health code violations. Scores on inspections, and other gathered data, may be considered a sample based on the tests. 2) Determine whether the given value is a statistic or a parameter. a) A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer. This is a parameter. I am fairly certain the researcher did not count every...
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...Data File 5 Chapter Nine Show all work Problem 1) A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance. Problem 2) At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased. Formulate the null and alternative hypotheses for the study described. Problem 3) A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null hypothesis? Problem 4) A two-tailed test is conducted at the 5% significance level. What is the right tail percentile required to reject the null hypothesis? Problem 5) What is the difference between an Type I and a Type II error? Provide an example of both. Chapter 10 Show all work Problem 1) Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a scale from 1 to 10, with 1 indicating...
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...Lorem ipsum dolor sit amet, ac consectetuer risus ligula arcu amet, lectus massa ut varius. Id convallis velit ligula aut in semper, mattis turpis, ante luctus lorem. Enim repudiandae. Tristique praesent at, morbi pellentesque. Ipsum suspendisse in urna, ac curabitur. Lacus purus, velit vulputate, voluptatem leo pede elementum lorem, diam sed fusce neque nulla amet augue. Sed massa leo magnis et nonummy duis, aliquet tellus enim dolor diam mi vitae, aliquam diam phasellus felis. Dolore conubia. Nunc sapien dapibus lorem conubia odio a. Non erat tincidunt. Non aliquam accumsan eu. Bibendum dui pellentesque metus, dolor tempus, mollis id nec ante. Nec sit magna, nam tempor ornare. Nec elit wisi molestie vel, dui libero etiam potenti nonummy aliquam tristique, sodales per ac in est, commodo augue pellentesque. Interdum adipiscing proin nec varius mauris, quam elementum donec metus quam semper nec. Morbi turpis parturient integer dolor. Proin quam lorem nam cras, pede lectus est risus, justo lobortis id. Proin neque ante praesent varius, pede feugiat nec ante scelerisque libero elit. Tellus sapien, vitae vestibulum fusce tellus faucibus maecenas. Nisl a mattis vivamus laoreet, at libero ligula libero nulla, eget nec in maecenas nunc ut mauris. Metus odio dui congue lacus suspendisse, vestibulum eget id ligula vel dui lobortis. Vivamus et. Tempor donec sapiente sollicitudin. Nulla varius praesent integer rutrum, molestie et. Nunc vivamus orci ligula ipsum dignissim ante, non risus...
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... When to use standard I/O (A) When working with disk or terminal files (B) When you need to fetch file metadata [a] (C) None (D) All the above 2. Difference between getc and fgetc (a) fgetc can be implemented as macro, where as getc cannot be implemented as macro (b) getc can be implemented as macro, where as fgetc cannot be implemented as a macro [b] (c) getc is used to write a character and fgetc to read a character (d) fgetc to write a character and getc to read a character 3. rewinddir returns (a) 0 (b) -1 [c] (c) no value (d) error (4) The functions which change the execution mode of the program from user mode to kernel mode are known as (a)...
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...PROCEDURES FOR CONDUCTING PRACTICAL ICT TESTS The Supervisor A suitably competent supervisor, who may be the candidates’ tutor, is responsible for the administration of the practical tests according to these instructions. The supervisor is responsible for the preparation of the hardware and software for the test. Timetabling of the Practical Tests CIE does not timetable the practical tests in the same way as most IGCSE and AS & A Level written papers. The IGCSE and AS & A Level timetable will specify a period within which candidates must take the two practical tests for each syllabus. Within this period, Centres may conduct the practical tests at any convenient time or times. Candidates must complete each practical test in a single session. Wherever possible, candidates from the same Centre should sit their assessment at the same time. If more than one session is necessary to accommodate all candidates, these sessions should follow on from each other. However, Centres do not need to sequester candidates until other candidates have taken the test. When arranging examination dates, Centres should take into account the time needed to set up the system and should allow contingency planning (e.g. to reschedule examination times due to possible hardware failure) wherever possible. Preparation for the Practical Tests Before the candidates take a practical test, the supervisor must work through a past/specimen paper, using the hardware and software that the candidates will be using...
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...Introducing Transaction Log Files Each SQL Server 2000 database has at least one transaction log file and can have multiple transaction log files spread across a number of disks. Each transaction log file is a separate operating system file and is used by only one database. Each transaction log file generally has the .ldf filename extension (this extension is not required). Each transaction log has a logical filename that is used in Transact-SQL statements and a physical filename that is used by the Windows operating system. Additional file properties include the file ID number, initial file size, file growth increment (if any), and maximum file size. Unlike data files that contain pages, transaction log files contain a series of transaction log records. A sequential log sequence number (LSN) identifies each transaction log record. Regardless of the number of physical log files, SQL Server 2000 treats the transaction log as one continuous log. SQL Server 2000 logically divides each physical transaction log file into a number of virtual log files (VLFs). The number and size of virtual log files are determined dynamically based on the size of each transaction log file. Each transaction log file has at least two VLFs. Each growth increment (if any) is treated as a separate physical file with its own VLFs. The number or size of VLFs cannot be configured or set directly by the database administrator. SQL Server 2000 tries to maintain a small number of virtual file logs because it operates...
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...Summary A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run. Disinfection & Removal Automatic Disinfection Allow F-Secure Anti-Virus to disinfect the relevant files. For more general information on disinfection, please see Removal Instructions. Technical Details The CIH virus was first located in Taiwan in early June 1998. After that, it has been confirmed to be in the wild worldwide. It has been among the ten most common viruses for several months. CIH has been spreading very quickly as it has been distributed through pirated software. History It seems that at least four underground pirate software groups got infected with the CIH virus during summer 1998. They inadvertently spread the virus globally in new pirated softwares they released through their own channels. These releases include some new games which will spread world-wide very quickly. There's also a persistent rumor about a 'PWA-cracked copy' of Windows 98 which would be infected by the CIH virus but F-Secure has been unable to confirm this. Later on, CIH was distributed by accident from several commercial sources, such as: • Origin Systems website where a download related to the popular Wing Commander game was infected • At least three European PC gaming magazines shipped magazines where the cover CD-ROM was infected - one of them even included a note inside advising users to disinfect their...
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...MapReduce: Simplified Data Processing on Large Clusters Jeffrey Dean and Sanjay Ghemawat jeff@google.com, sanjay@google.com Google, Inc. Abstract MapReduce is a programming model and an associated implementation for processing and generating large data sets. Users specify a map function that processes a key/value pair to generate a set of intermediate key/value pairs, and a reduce function that merges all intermediate values associated with the same intermediate key. Many real world tasks are expressible in this model, as shown in the paper. Programs written in this functional style are automatically parallelized and executed on a large cluster of commodity machines. The run-time system takes care of the details of partitioning the input data, scheduling the program’s execution across a set of machines, handling machine failures, and managing the required inter-machine communication. This allows programmers without any experience with parallel and distributed systems to easily utilize the resources of a large distributed system. Our implementation of MapReduce runs on a large cluster of commodity machines and is highly scalable: a typical MapReduce computation processes many terabytes of data on thousands of machines. Programmers find the system easy to use: hundreds of MapReduce programs have been implemented and upwards of one thousand MapReduce jobs are executed on Google’s clusters every day. 1 Introduction Over the past five years, the authors and many others at...
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...com/category/cis-407/ ---------------------------------------------------- Cis 407a – ilab 3 of 7 Scenario/Summary In this lab, we will demonstrate how to save user activity data in a database. We will be creating a new form to display the user activity data, a new dataset to contain the data, a data access class to structure the code, and a function within the data access class to save users’ activity data when users visit the Personnel form page (frmPersonnel.aspx). We will also be adding server side validation to the frmPersonnel for you added in the previous lab and update or main menu for the new functionality. Instructions for Week 3 iLab: “User Activity Monitoring” Click on the link above to view the tutorial. This video will show you how to set up user activity monitoring using Visula Studio and C#. The tutorial has audio. Deliverables All files are located in the subdirectory of the project. The project should function as specified: When you visit the Personnel form page (frmPersonnel.aspx), a record should be saved in the tblUserActivity table with the IP address, form name accessed (frmPersonnel), and the date accessed. When you click the “View Activity” button, you should see at least one record with this information. When the user goes to the frmPersonnel web form and enters data the following business rules are to be enforced: Fields may not be empty or filled with spaces. If any field is empty, turn that field background color to yellow and add...
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...milepost and mile-exits about, how we processed the new data to matching the existing data attributes, how we updated the chartcenterline by appending the new ICC centerline, what methods we used in the whole process. 1. Identify the database update requirements and target The Intercounty Connctor or ICC (MD 200) route is a partially completed toll freeway which will link existing and proposed development areas between the I-270/I-370 . In review of exiting ArcGIS service map file ChartBG.mxd (on the “chartdevgis” server C:\arcgisserver\MapDocument\) – a Chart interactive background map, we can know that there is a miss for the ICC route. To make the background map with a complete required feature route present in the map, we need to update the existing ChartBG geodatabase to make up the missed ICC route (MD 200) by using the new data provided by SHA. The update requires the three feature classes are available in the existing ChartBG map service file. That means the existing interstates feature classes will be required to append new features from the data below. 1. ICC centerline (MD 200) 2. ICC Milepost 3. ICC MileExits In brief, the purpose of the geodatabase update is to add the ICC related features into the existing geodatabase by appending them to the corresponding feature class. 2. Describing the new data source about ICC centerline and mileposts and mile-exits ...
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...1. Investigate data and information Data is collected about individuals and groups by a large number of organisations and in a variety of ways. a) Form a group of approximately four students and discuss the organisation that is allocated to you by your tutor. b) Fill in the following table as you discuss what data is collected by the different organisation types, and how this data is used regarding individuals and groups. c) Present your ideas to the class. d) Organisation Type Data collected for individual What information can be gained from this data about individuals? What information can be gained from this data about groups? Government Departments Passport, Banking / Finance Retail Education Sector Search Engines Social networking sites 2. Data management Given the file structure shown in the above Figure, answer the following questions: a) How many records does the file contain? How many fields are there per record? b) What problem would you encounter if you wanted to produce a listing by city? How would you solve this problem by altering the file structure? c) If you wanted to produce a listing of the file contents by last name, area code, city, state, or zip code, how would you alter the file structure? d) What data redundancies do you detect? How could those redundancies lead to anomalies? 3. Question(s) a) Find definitions using your text or other appropriate source for...
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...What is data? Data is often information set of values mainly in text or electronic strings of 0’s and 1’s formatted in a special way to suit the data system or operating software used which manipulates the data into a set of instructions that exist in many forms in paper or electronic bits and bytes that are saved in electronic memory. 2. Write a list of the kinds of data that we can save, store, organise and return and retrieve with music technology. There are many kinds of data that can be used in music technology and comes in different formats like .WAV .AIFF which are uncompressed audio formats used as samples or loop files within DAW software, Also MIDI formats are used for generating powerful sounds from a basic control signal that can be put directly into a digital sound environment, all these sounds can be arranged, edited and organised well within music technology software today. 3....
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... 2. Testing Credit Procedures * It pertains to the valuation/allocation audit objectives and the accuracy objective 3. Data Validation Controls * Input validation controls are intended to detect transcription errors in transaction data before they are processed. Validation procedures are most effective when they are performed as close to the source of transaction as possible. a. Missing Data Check – are used to examine the contents of a field for the presence of blank data or spaces (missing product numbers, missing customer accounts numbers, or incomplete mailing address) b. Numeric-alphabetic data checks – determine whether the correct form of data is in a field. An invoice total should not contain alphabetic data. c. Limit Check-determine if the value In the fields exceeds an authorized limit. (prices limit or discounts limit) 4. Batch Controls – are used to manage high volumes of transaction data through a system. The following are relevant controls: a. A unique batch number b. A batch date c. A transaction code (indicating the type of transactions, such as sales order or cash receipt). d. The numbers of records in the batch (record count) e. The total dollar value of a financial field (batch control total) f. The total of a unique nonfinancial field (hash total) PROCESS CONTROLS 1. File Update Controls – monitoring the batch as it moves from one programmed procedure (run) to another. 2. Sequence Check Control...
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...Grand Toudeka 8/17/2014 CS102 Homework * Short answer 1. 1) The file must be opened. If the file does not yet exist, opening it means creating it. 2) Data is written to the file or read from the file. 3) When the application is finished using the file, the file is closed 2. The close method writes any unsaved information remaining in the file buffer and releases memory allocated by the StreamWriter object. 3. Data is rad in forward-only direction. When the file is opened, its read position, the position of the next item to be read, is set to the first item in the file. As data is read, the read position advances through the file. 4. The WriteLine method writes the data to the file and then writes a newline character immediately after the data. The Write method can be used to write data to a file without terminating the line with a newline character. 5. An exception will occur. 6. If the current read position is at the end of the file, the method returns -1. 7. The ReadLine method returns the data as a string. 8. The Read method returns the integer code for the character. 9. When the Print method is called, it triggers a PrintPage event. PrintPage event handler, you can write code that sends text to the printer using a specified font and color at specified location. 10. If you use the Public access specifier, the structure is accessible to statements outside the class or module. If you use the...
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...Guide to UNIX Using Linux Fourth Edition Chapter 5 Answers to the Chapter 5 Review Questions 1. You have just finished a 25-page paper that you have written using Emacs. The file containing the paper is called /assignments/data_sources. After your instructor has briefly looked at the paper, she recommends that you change all instances of the reference “data is” to “data are” before you submit it. Which of the following commands can you use to locate these references in the file for a quick assessment of how much you have to change? c. grep "data is" /assignments/data_sources 2. You are interested in determining the number of words in your /assignments/data_sources file mentioned in Question 1. Which of the following commands should you use? a. wc -w /assignments/data_sources 3. Which of the following are examples of manipulation and transformation commands? (Choose all that apply.) a. sed b. pr c. join d. paste 4. Which of the following is true of the pipe operator? (Choose all that apply.) d. It redirects the output of one command to the input of another command. 5. Because the data was formatted the same in two inventory files, you decided to combine their contents into one file. Now you want to determine if there are duplicate entries on consecutive lines in the new file. Which of the following commands enables you to find the duplicate entries? c. uniq 6. Your friend is using the command comm entryfile, but is getting an error message. What...
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