-1.0 -0.5 0.0 0.5 1.0 It is a classification data-set with the goal of separating the red and the black observations. Assume, that the number of red and black observations is approximately equal. Which of the following statements is correct? a) A Decision Tree can reach a prodiction error of (nearly) zero on this data-set. b) When performing a variable selection using the step-wise forward selection algorithm, neither of the variables I1, 12 will be added to the model. c) A Linear Discriminant Analysis (LDA) can reach a prediction error of (nearly) zero on this data-set. d) Every model using only one of the two variables 11, 1ą will have a misselassification error of approximately 50%. 00 0'1-

-1.0 -0.5 0.0 0.5 1.0 It is a classification data-set with the goal of separating the red and the black observations. Assume, that the number of red and black observations is approximately equal. Which of the following statements is correct? a) A Decision Tree can reach a prodiction error of (nearly) zero on this data-set. b) When performing a variable selection using the step-wise forward selection algorithm, neither of the variables I1, 12 will be added to the model. c) A Linear Discriminant Analysis (LDA) can reach a prediction error of (nearly) zero on this data-set. d) Every model using only one of the two variables 11, 1ą will have a misselassification error of approximately 50%. 00 0'1-

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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Consider a set of movies M1, M2, ... , Mk. There is a set of customers, each one of which indicates the two movies they would like to see this weekend. Movies are shown on Saturday evening and Sunday evening. Multiple movies may be screened at the same time. You must decide which movies should be televised on Saturday and which on Sunday, so that every customer gets to see the two movies they desire. Is there a schedule where each movie is shown at most once? Design an efficient algorithm to find such a schedule if one exists.
Let A = {1, 2, 5} and B = {3, 4, 5} be sets. What is the cardinality of the power set p(p((A U B)-B)) [Input numeric value only] Answer: ?
link(a,b). link(a,c). link(b,c). link(b,d). link(c,d). link(d,e). link(d,f). link(e,f). link(f,g). Using The above Formulate the appropriate Prolog predicate "path(X,Y,N)" which is true if (and only if) there is a path of length "N" from node "X" to node "Y". For example, there is a path of length 2 from "a" to "d": "a->b->d", but also "a->c->d", and so "path(a,d,2)" gives "true" (two times). There is also a path of length 3 from "a" to "d": "a->b->c->d". Test this predicate out on the above network to verify whether or not it is working correctly. Once this is working correctly, note now, that e.g., "path(a,e,N)." will give multiple answers:
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Need Help with Octave: function [w, t, flag] = margin_pcpt(X, y, max_iter, max_margin)[m, n] = size(X);flag = 0;w = zeros(n, 1);t = 1;while (t < max_iter) && (flag == 0)% Your tasks: % 1. searches for violation point p such that % (a) the label disagrees with p*w; OR % (b) the distance between p and seperation line is too close, i.e. % p*(w./norm(w, 2)) <= max_margin % 2. update the seperation plane vector w % 3. if there is no more violation point, set flag = 1. t = t + 1;end% as a good habit: normalise the seperation vector by it's normw = w./norm(w, 2);end
Suppose we have a piece of text that consists of five characters: a, e, i, s, t. By scanning the text, we have the following frequency table. character a e i s t frequency 10 15 12 3 4 1) Compute the size of the text assuming each character is coded using 3 bits. 2) Apply Huffman coding to the problem by building a Huffman tree, which can provide the optimal coding for each character. You only need to show the final Huffman tree and the codeword for each character. 3) What is the size of the compressed text in Huffman codes?
Vertex S denotes the start state and vertices G1 and G2 denote the two goal states. Directed edges are labelled with the actual costs of traversing the edge. In what order would Breadth-First Search retrieve the states from the frontier when starting the search in S? If all else is equal, consider states in alphabetic order. There are two possible correct answers, depending on what variant of Breadth-First Search you are using. Select either one of them to receive full marks. options are S, A, B, C, D, E, F, G1 b. S, A, B, C, E, F, D, G1 c. S, A, B, C, E, F, G1 d. S, A, B, C e. S, A, C, G1 f. S, A, E, G1 g. S, B, A, C, E h. S, B, F, D, G2 i. S, C, B, F, A, D, E, G1 j. S, C, G1
A town wishes to build a trail between city A, city B, city C, city D, and city E. The distances, in miles, between any two of the destinations are given in the table. Use the table to answer parts (a) and (b) below. A B C D E A * 154 134 216 129 B 154 * 195 51 243 C 134 195 * 225 220 D 216 51 225 * 308 E 129 243 220 308 * a) Use Kruskal's algorithm to determine the minimum-cost spanning tree that would link each location to create the least expensive trail. Choose the correct graph below. A. ABCD154216225E129 B. ABCD15419551E129 C. ABCD15413451E129 D. ABCD154134216E129 b) If the cost of building such a trail is $3700 per mile, what is the cost of building the trail determined in part (a)? The cost is:
Which of the following is not TRUE for a K - map ? o overlapping of groups is not allowed O No of members in a group is 1,2,4,8 or 16 in a 4 variable K Map o Grouping of 1's gives a SOP expression O All given options are TRUE o When grouping , larger groups are advisable
2) (L2) Prove using laws of logic that the conditional proposition (p ∧ q) → r is equivalent to (p ∧ ¬ r) →¬ q. 3) (L3) Show that the converse of a conditional proposition p: q → r is equivalent to the inverse of proposition p using a truth table. 4.1) (L4) Show whether ((p ∧ (p→q)) ↔ ¬p) is a tautology or not. Use a truth table and be specific about which row(s)/column(s) of the truth table justify your answer. 4.2) (L4) Give truth values for the propositional variables that cause the two expressions to have different truth values. For example, given p ∨ q and p ⊕ q, the correct answer would be p = q = T, because when p and q are both true, p ∨ q is true but p ⊕ q is false. Note that there may be more than one correct answer. r ∧ (p ∨ q) (r ∧ p) ∨ q
Given references to the following pages by a program,4, 2, 3, 9, 3, 2, 5, 4, 6, 3, 5, 4, 9, 3, 6, 9, 4, 6, 3, 1, 6, 1, 2, 1. Question: Determine the number of page faults if the program has 4 frames available to it and uses: a. FIFO = b. OPTIMAL = c. LRU = d. LFU = e. MFU =
Suppose you have been given a map of 6 cities connected with each other via different paths. Your job is to visit every city just once covering the minimum distance possible. Solve this problem using Genetic Algorithm. You can start at any point and end at any point. Just make sure that all the cities have been covered. 1. Encode the problem and create an initial population of 3 different chromosomes 2. Choose any one parent from your above solution and identify the following:i. Gene ii. Chromosome 3. Think of an appropriate fitness function to this problem and give proper justification. 4. Use the fitness function to calculate the fitness level of all the chromosomes in your population. Select the fittest 2 chromosomes based on the fitness function. 5. Perform crossover that you have been taught in the class on the selected parents. Now based on the offspring, for this problem do you think that is the best way to perform crossover? If not, explain why. 6. Perform mutation that you…