TRUE OR FALSE Question between an entity set and a P 8. Ifa relation is in...
Question 8 4 pts A relation Rfrom a set A to a set Bis a subset of а. А х А b. Вх В с. Ах В d. B x A d. Question 9 4 pts A relation Ron a set A is an equivalence relation if either of the following is true: (a) Ris reflexive on A (b) Ris symmetric on A (c) Ris transitive on A. True False
8. On the set A = {1,2,3,4,...,20}, an equivalence relation R is defined as follows: For all x, y € A, xRy 4(x - y). For each of the following, circle TRUE or FALSE. [4 points) a. TRUE or FALSE: There are only 4 distinct equivalence classes for this relation. b. TRUE or FALSE: If you remove all the even numbers from A, the relation would still be an equivalence relation. C. TRUE or FALSE: In this equivalence relation, 2R5...
38 - An entity is the set of facts in a record. True False 39 - When different kinds of data (data about different entities) are merged in one file, which of the following anomalies can occur? deletion but not insertion or update insertion but not deletion or update insertion and deletion but not update insertion and update but not deletion deletion, insertion, and update 40 - Rebuilding a database after it is destroyed by a natural disaster is an...
Question 10 Generally, the law recognizes a partnership as an independent entity. True False
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true or false questions
17. The smallest positive real number is c, where c = card(0,1). 18. To show that two sets A and B are equal, show that x A and x B. 19. If (vx)P(e) is false, then P(x) is never true for that domain. 20. If R is a relation on A and if (a, a) is true for some a in A, then R is reflexive. 21. If f:A → B is a function, then...
Question 5-9
Answer the question True or False (Each question is worth 1 p) 1. If A and B are mutually exclusive, then A and B are i A) True B) False 3. The sample standard deviation of a sample of data points must not be negative. 4. High school GPAs are qualitative data 5. Sample is one of the 6 elements of Statistics A) True B) False A) True B) False A) True 6. Let X be the length...
QUESTION 2 True or False: In a very large normally distributed data set, same measures of center are all essentially the same O True False QUESTION 3 True or False: In a Histogram graph, the mean influenced by extreme values and the median is less likely to be influenc O True O False QUESTION 4 If I want to know if my set of data follows a Normal Distribution, what type of graph provides me those results? Run Chart Dotplot...
QUESTION 7 There is NOT a difference between Internet and internet. True False QUESTION 8 hides messages on unrelated content and manages security for the freedom of speech QUESTION 9 is a fundamental building block for security mechanisms
Question 8
Let R be relation on a set A. 1. When is R said to be an equivalence relation? Give a precise definition, using appropriate quantifiers etc. 2. When is R said to be an partial order? Give a precise definition, using appropriate quantifiers etc (You don't need to redefine things that you defined in the previous part... you may simply mention them to save time.) 3. On Z, define a relation: a D biff a - b is...
please help me with question 8
4. Tis irreflexive Quest Whier onsider the following relation on set B = (a, b, (a), (b), (e. f(a, b), (b. (a, b)) ((a, b), a). ({b}, a),(a, - er questions 7 to 10 by using the given relation P and the set B. 2. Question 7 on one of the following alternatives represents the range of P (ran(P))? + 1. 2. 3. 4. (a, b, (a). (a, b)} ſa, b. (a), (b), (a,...