Question 2Let A and B be two events, and assume that 0

The smallest possible value of P(A∣B)+P(A∣notB)is0. Let's assume A and B are mutually exclusive…

Answered: Let A and B be two events, and assume…

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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Your task is simple: use machine learning to create a model that predicts which passengers survived the Titanic shipwreck. Implement and train a classification model for the Titanic dataset (the dataset can be found here: https://www.kaggle.com/c/titanic). Please ignore the test set (i.e., test.csv) and consider the given train set (i.e., train.csv) as the dataset. What you need to do: 1. Data cleansing 2. Split the dataset (i.e., train.csv) into a training set (80% samples) and a testing set (20% samples) 3. Train your model (see details below) 4. Report the overall classification accuracies on the training and testing sets 5. Report the precision, recall, and F-measure scores on the testing set 1. Required Model (100 pts): Implement and train a logistic regression as your classification model. • You have to use Sklearn deep learning library. • You may want to refer to this tutorial: https://bit.ly/37anOxi
Give a loop invariant that accurately relates the present values of, r, s, x, and y.Look at the GCD loop property for a hint. This invariant is also true when the calculation is between the first and second step of each iteration, in addition to being true each time the computation is at the top of the loop. Prove that your method creates and keeps the loop invariant as claimed.
Leader-Member Exchange (LMX) and Path-Goal Theories apply here. Use real-life cases to explain anything.
Sometimes, like with 203, the sequence reaches (and stays at) 1. Numbers like this are called happy. Not all numbers are happy. If we started with 11, the sequence would be: 11 -> 2 -> 4 -> 16 -> ... This sequence will never reach 1, and so the number 11 is called unhappy. Given a positive whole number, you have to determine whether that number is happy or unhappy. Examples happy (203) → true happy (11) → false happy (107) → false Notes
Let P(x) = "x passed the class". Let S(x) = "x studied". Let L(x) = "x got lucky". Which statement below means "Everyone who passed the class either studied or got lucky"? OVx ((P(x)→ S(x)) V L(x)) None of the other answer here listed is correct. OVx( P(x)→ S(x)) V L(x) OVx ((S(x) V L(x)) → P(x)) OV (P(x) → (S(x) v L(x)) ) OV (L(x) V (P(x) → S(x)))
Correct and detailed answer will upvoted else downvoted . Skip if you don't know. there live N individuals, numbered from 1 to N. There are by and large M sets of individuals that are companions with one another. Individuals of Baltia need to put together a fruitful party, however they have extremely severe guidelines on what a party is and when the party is effective. On the island of Baltia, a party is a social occasion of precisely 5 individuals. The party is viewed as effective if either every one individuals at the party are companions with one another (so they would all be able to converse with one another without stressing over conversing with somebody they are not companions with) or no two individuals at the party are companions with one another (so everybody can simply be on their telephones without any other person troubling them). If it's not too much trouble, help individuals of Baltia put together a fruitful party or let them know that it's difficult to do as such.…
A square shape with its contrary corners in (0,0)(0,0) and (a,b)(a,b) and sides corresponding to the tomahawks is drawn on a plane. You are given a rundown of cross section focuses with the end goal that each point lies on a side of a square shape yet not in its corner. Additionally, there are something like two focuses on each side of a square shape. Your undertaking is to pick three focuses so that: • precisely two of them have a place with a similar side of a square shape; • the region of a triangle framed by them is most extreme conceivable. Print the multiplied region of this triangle. It very well may be shown that the multiplied region of any triangle framed by cross section focuses is consistently a whole number
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Considering the problem of performing rapid COVID test among a large group of people. Assuming there are exactly 1 positive case among N people, and you are asked to find the positive case with the least number tests. 1. A straight forward approach is to test every single person, which requires N tests in total. Can you design a testing framework that works better than the greedy one under, even under the worst-case scenario? Write the pseudo code for your approach and briefly explain the time complexity of your approach. 2. Based on your framework, if there are 1,000 people, what are the maximum number of tests that need to be performed in order to identify the positive case (number of tests required in the worst case)?
3. Consider one-dimensional totalistic rules with 3 colors and two neigh- bors as before. White (0), grey (1) and black (2) are the colors. Totalistic means that the state in the middle cell in the next generation only depends on the sum of the 3 cells. This sum goes from 0 to 6. How many rules of this type? You have to modify the command CellularAutomaton a little. Read about the Details. Time to have a look at a special rule, rule 1329. Since you have 3 colors you must express this number in base 3. Use command BaseForm. Start with one grey cell in the middle of a long string of white cells and try to understand what is going on. Is the pattern periodic?

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Let A and B be two events, and assume that 0 < P(B) < 1. What is the largest possible value P(AIB) + P(A| not B) might have? (Tip, if you're stuck: think about possible examples for the events A and B, be creative, and see what you can figure out about this expression.)