**Educational Content on Generating a ROC Curve**### IntroductionIn the given problem, we have 10 instances: 5 Positive (P) and 5 Negative (N). The table below shows the class and score for each instance. We are tasked to generate a Receiver Operating Characteristic (ROC) curve using this data and to evaluate the classifier's performance. Additionally, we will choose an optimal threshold and justify this choice.### Data Table| Instance Number | Class | Score ||-----------------|-------|-------|| 1 | P | 0.9 || 2 | P | 0.8 || 3 | P | 0.7 || 4 | P | 0.6 || 5 | N | 0.55 || 6 | N | 0.5 || 7 | P | 0.4 || 8 | N | 0.3 || 9 | N | 0.2 || 10 | N | 0.1 |### Instructions1. **ROC Curve Generation:** - The ROC curve is a graphical representation of a classifier's performance. It plots the True Positive Rate (TPR) against the False Positive Rate (FPR) at various threshold settings. - To create the ROC curve, calculate the TPR and FPR for different threshold values from the highest score to the lowest.2. **Threshold Selection:** - The threshold determines the score above which an instance is classified as positive. - Choose a threshold that balances sensitivity (TPR) and specificity (1 - FPR). 3. **Justification of Threshold:** - Justify your chosen threshold based on the problem's context. Consider the costs of false positives versus false negatives.### NoteYou do not need to write code; this exercise is intended to be solved using paper and pencil (or equivalent).

Receiver Operating Characterestic A receiver operating characteristic curve, or ROC bend, is a…

We have 10 instances: 5 P and 5 N, given in the following table. Generate a ROC curve and comment on the performance of the classifier. What threshold you will choose? Justify your choice of threshold. Instance Number Class Score 1 P 0.9 0.8 3 P 0.7 4 0.6 0.55 0.5 N 7 0.4 8 N 0.3 9. N 0.2 10 N 0.1 Note: You don't need to write code: vou have to solve this problem using paper and pencil (or

We have 10 instances: 5 P and 5 N, given in the following table. Generate a ROC curve and comment on the performance of the classifier. What threshold you will choose? Justify your choice of threshold. Instance Number Class Score 1 P 0.9 0.8 3 P 0.7 4 0.6 0.55 0.5 N 7 0.4 8 N 0.3 9. N 0.2 10 N 0.1 Note: You don't need to write code: vou have to solve this problem using paper and pencil (or

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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omplete the PoundDog code by adding a constructor having a constructor initializer list that initializes age with 1, id with -1, and name with "NoName". Notice that MyString's default constructor does not get called. Note: If you instead create a traditional default constructor as below, MyString's default constructor will be called, which prints output and thus causes this activity's test to fail. Try it! // A wrong solution to this activity... PoundDog::PoundDog() { age = 1; id = -1; name.SetString("NoName"); } #include <iostream>#include <string>using namespace std; class MyString { public: MyString(); MyString(string s); string GetString() const { return str; }; void SetString(string s) { str = s; }; private: string str;}; MyString::MyString() { cout << "MyString default constructor called" << endl; str = "";} MyString::MyString(string s): str(s) {} class PoundDog { public: PoundDog(); void Print() const;…
2 class lineType Instructions 3 { 4 public: The equation of a line in standard form is ax void setline (double a = 0, double b = 0, doublec = e); + by = c, wherein both a and b //Function to set the line. 7 8 void equation() const; cannot be zero, and 9 a, b, and c are double getXCoefficient() const; 10 real numbers. If b#0, double getYCoefficient() const; 11 then -a/b is the slope double getconstantTerm() const; 12 13 of the line. If a = 0, 14 void setXCoefficient (double coeff); then it is a horizontal 15 void setYCoefficient(double coeff); line, and if b = 0, then 16 void setConstantTerm(double c); it is a vertical line. The 17 slope of a vertical line double slope() const; 18 is undefined. Two lines are parallel if 19 //Return the slope. This function does not check if the 20 //line is vartical. Because the slope of a they have the same vertical line slope or both are //is undefined, before calling this function 21 vertical lines. Two check if the lines are 22 //line is nonvertial.…
Complete the Course class by implementing the courseSize() method, which returns the total number of students in the course. Given classes: Class LabProgram contains the main method for testing the program. Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) Class Student represents a classroom student, which has three fields: first name, last name, and GPA. Ex. For the following students: Henry Bendel 3.6 Johnny Min 2.9 the output is: Course size: 2 public class LabProgram { public static void main (String [] args) { Course course = new Course(); // Example students for testing course.addStudent(new Student("Henry", "Bendel", 3.6)); course.addStudent(new Student("Johnny", "Min", 2.9)); System.out.println("Course size: " + course.courseSize()); } } public class Student { private String first; // first name private String last; // last name private…
The goal of this coding exercise is to create two classes BookstoreBook and LibraryBook. Both classes have these attributes: author: Stringtiltle: Stringisbn : String- The BookstoreBook has an additional data member to store the price of the book, and whether the book is on sale or not. If a bookstore book is on sale, we need to add the reduction percentage (like 20% off...etc). For a LibraryBook, we add the call number (that tells you where the book is in the library) as a string. The call number is automatically generated by the following procedure:The call number is a string with the format xx.yyy.c, where xx is the floor number that is randomly assigned (our library has 99 floors), yyy are the first three letters of the author’s name (we assume that all names are at least three letters long), and c is the last character of the isbn.- In each of the classes, add the setters, the getters, at least three constructors (of your choosing) and override the toString method (see samplerun…
Assume that CSCourse class has been written, which has the below UML Diagram. You are giyen the CourseManager class and are asked to complete the main method. Write a body of the main method only that creates two objects of type CSCourse, so that: the first CSCourse is named "CS210% and has 32 students and an average GPA of 3.1 the second CSCourse is named "CS211" and has 31 students and an average GPA of 3.4 sum the students in two courses using the getNumStudents() method, and print the sum to the screen. C) cSCourse name : String -numStudents: int -averageGPA double +CSCourse(name String, numStu int) +getNumStudents() int +getName(): String +setAverageGPA(AVGPA: double) : void public class CourseManager{ public static void main(String[] args) [ / Your code goes here // Sample output is "Sum of students: 63".
For this assignment you will be building on your Fraction class. However, the changes will be significant, so I would recommend starting from scratch and using your previous version as a resource when appropriate. For this assignment, we will correctly handle Fractions that are negative, improper (larger numerator than denominator), or whole numbers (denominator of 1). Your class should support the following operations on Fraction objects: Construction of a Fraction from two, one, or zero integer arguments. If two arguments, they are assumed to be the numerator and denominator, just one is assumed to be a whole number, and zero arguments creates a zero Fraction. Use default parameters so that you only need a single function to implement all three of these constructors.You should check to make sure that the denominator is not set to 0. The easiest way to do this is to use an assert statement: assert(inDenominator != 0); You can put this statement at the top of your constructor. Note…
I need help with the main function, please. I have all classes I need I just need the main function
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Write a class that tests and demonstrates that your Candidate and Electionclasses implement the specification given above. Note that this does not need to be a Junit test class.Your test class must illustrate all of the features that you have implemented. This will best be done by having at least one separate test method for each feature. For instance:• A method that creates a Candidate object and prints out the result of calling each of its accessor (get) methods; • A method that adds a vote to an existing Candidate object.• A method that creates an Election object, creates a few Candidateobjects and adds them to it, and then calls the printAll method;• A method that finds a matching Candidate;• A method that does not find a matching Candidate;• etc.Note that the list above is not a complete list of the test class’s methods and you will need to define more than those for this part. It will be worth writing this test class alongside writing the other classes. For instance, develop the…
Hi, I am making a elevator simulation and I need help in making the passenger classes using polymorphism. Any help is appreciated. There are 4 types of passengers in the system:Standard: This is the most common type of passenger and has a request percentage of 70%. Standard passengers have no special requirements.VIP: This type of passenger has a request percentage of 10%. VIP passengers are given priority and are more likely to be picked up by express elevators.Freight: This type of passenger has a request percentage of 15%. Freight passengers have large items that need to be transported and are more likely to be picked up by freight elevators.Glass: This type of passenger has a request percentage of 5%. Glass passengers have fragile items that need to be transported and are more likely to be picked up by glass elevators. This is what I have so far // Passenger abstract classpublic abstract class Passenger { protected String type; protected int requestPercentage; public…