Introductory Combinatorics
5th Edition
ISBN: 9780136020400
Author: Richard A. Brualdi
Publisher: Prentice Hall
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Chapter 10, Problem 43E
To determine
To construct: Three MOLS of order 7.
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10. A sound wave's amplitude can be modeled by the function y = −7 sin ((x-1) + 4). Within the interval 0 < x < 12, when does the function have an amplitude
of 4? (Select all that apply.)
9.522 seconds
4.199 seconds
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Tabudi Maphoru
Activities Assessments Class Progress lIE Library • Help v
The table below shows the prices (R) and quantities (kg) of rice, meat and potatoes items bought during 2013 and 2014:
2013
2014
P1Qo
PoQo
Q1Po P1Q1
Price
Ро
Quantity
Qo
Price
P1
Quantity
Q1
Rice
7
80
6
70
480
560
490
420
Meat
30
50
35
60
1 750
1 500
1 800
2 100
Potatoes
3
100
3
100
300
300
300
300
TOTAL
40
230
44
230
2 530
2 360
2 590
2 820
Instructions:
1 Corall dawn to tha bottom of thir ceraan urina se se tha haca nariad in archerca antarand cubmit
Q Search
ENG US
口X
2025/05
The table below indicates the number of years of experience of a sample of employees who work on a particular production line and the corresponding number of units of a good that each employee produced last month.
Years of Experience (x)
Number of Goods (y)
11
63
5
57
1
48
4
54
45
3
51
Q.1.1 By completing the table below and then applying the relevant formulae, determine the line of best fit for this bivariate data set.
Do NOT change the units for the variables.
X
y
X2
xy
Ex=
Ey=
EX2
EXY=
Q.1.2 Estimate the number of units of the good that would have been produced last month by an employee with 8 years of experience.
Q.1.3 Using your calculator, determine the coefficient of correlation for the data set.
Interpret your answer.
Q.1.4 Compute the coefficient of determination for the data set.
Interpret your answer.
Chapter 10 Solutions
Introductory Combinatorics
Ch. 10 - Prob. 1ECh. 10 - Prob. 2ECh. 10 - Prob. 3ECh. 10 - Prob. 4ECh. 10 - Prove that no two integers in Zn, arithmetic mod...Ch. 10 - Prob. 6ECh. 10 - Prob. 7ECh. 10 - Prob. 8ECh. 10 - Prob. 9ECh. 10 - Determine which integers in Z12 have...
Ch. 10 - Prob. 11ECh. 10 - Prob. 12ECh. 10 - Let n = 2m + 1 be an odd integer with m ≥ 2. Prove...Ch. 10 - Use the algorithm in Section 10.1 to find the GCD...Ch. 10 - For each of the pairs of integers in Exercise 14,...Ch. 10 - Apply the algorithm for the GCD in Section 10.1 to...Ch. 10 - Start with the field Z2 and show that x3 + x + 1...Ch. 10 - Does there exist a BIBD with parameters b = 10, v...Ch. 10 - Prob. 19ECh. 10 - Prob. 20ECh. 10 - Determine the complementary design of the BIBD...Ch. 10 - Prob. 22ECh. 10 - How are the incidence matrices of a BIBD and its...Ch. 10 - Show that a BIBD, with v varieties whose block...Ch. 10 - Prove that a BIBD with parameters b, v, k, r, λ...Ch. 10 - Let B be a difference set in Zn. Show that, for...Ch. 10 - Prob. 27ECh. 10 - Show that B = {0, 1, 3, 9} is a difference set in...Ch. 10 - Prob. 29ECh. 10 - Prob. 30ECh. 10 - Prob. 31ECh. 10 - Prob. 32ECh. 10 - Let t be a positive integer. Use Theorem 10.3.2 to...Ch. 10 - Let t be a positive integer. Prove that, if there...Ch. 10 - Assume a Steiner triple system exists with...Ch. 10 - Prob. 36ECh. 10 - Prove that, if we interchange the rows of a Latin...Ch. 10 - Use the method in Theorem 10.4.2 with n = 6 and r...Ch. 10 - Let n be a positive integer and let r be a nonzero...Ch. 10 - Let n be a positive integer and let r and rʹ be...Ch. 10 - Use the method in Theorem 10.4.2 with n = 8 and r...Ch. 10 - Construct four MOLS of order 5.
Ch. 10 - Prob. 43ECh. 10 - Construct two MOLS of order 9.
Ch. 10 - Prob. 45ECh. 10 - Construct two MOLS of order 8.
Ch. 10 - Prob. 47ECh. 10 - Prob. 48ECh. 10 - Prob. 49ECh. 10 - Let A1 and A2 be MOLS of order m and let B1 and B2...Ch. 10 - Construct a completion of the 3-by-6 Latin...Ch. 10 - Prob. 53ECh. 10 - Prob. 54ECh. 10 - Prob. 55ECh. 10 - Prob. 56ECh. 10 - Prob. 57ECh. 10 - Prob. 58ECh. 10 - Prob. 59ECh. 10 - Prob. 60ECh. 10 - Let , where m is a positive integer. Prove that...
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- Use the figure for Exercises 1-2. Suppose you use geometry software to construct a secant CE and tangent CD that intersect on a circle at point C. File Edit Display Construct Transform Measure Graph Window Help D 1. Suppose you measure /DCE and you measure CBE. Then you drag the points around the circle and measure the angle and arc three more times. What would you expect to find each time? Which theorem from the lesson would you be demonstrating? 2. When the measure of the intercepted arc is 180°, what is the measure of the angle? What does that tell you about the secant?arrow_forwardQ.3.2 A sample of consumers was asked to name their favourite fruit. The results regarding the popularity of the different fruits are given in the following table. Type of Fruit Number of Consumers Banana 25 Apple 20 Orange 5 TOTAL 50 Draw a bar chart to graphically illustrate the results given in the table.arrow_forwardFor the given right triangle, the longer leg is 8 units long and the shorter leg is 6 units long. sina=arrow_forward
- Q.2.3 The probability that a randomly selected employee of Company Z is female is 0.75. The probability that an employee of the same company works in the Production department, given that the employee is female, is 0.25. What is the probability that a randomly selected employee of the company will be female and will work in the Production department? Q.2.4 There are twelve (12) teams participating in a pub quiz. What is the probability of correctly predicting the top three teams at the end of the competition, in the correct order? Give your final answer as a fraction in its simplest form.arrow_forwardQ.2.1 A bag contains 13 red and 9 green marbles. You are asked to select two (2) marbles from the bag. The first marble selected will not be placed back into the bag. Q.2.1.1 Construct a probability tree to indicate the various possible outcomes and their probabilities (as fractions). Q.2.1.2 What is the probability that the two selected marbles will be the same colour? Q.2.2 The following contingency table gives the results of a sample survey of South African male and female respondents with regard to their preferred brand of sports watch: PREFERRED BRAND OF SPORTS WATCH Samsung Apple Garmin TOTAL No. of Females 30 100 40 170 No. of Males 75 125 80 280 TOTAL 105 225 120 450 Q.2.2.1 What is the probability of randomly selecting a respondent from the sample who prefers Garmin? Q.2.2.2 What is the probability of randomly selecting a respondent from the sample who is not female? Q.2.2.3 What is the probability of randomly…arrow_forwardCan you answer this question and give step by step and why and how to get it. Can you write it (numerical method)arrow_forward
- Construct tables showing the values of alI the Dirichlet characters mod k fork = 8,9, and 10. (please show me result in a table and the equation in mathematical format.)arrow_forwardExample: For what odd primes p is 11 a quadratic residue modulo p? Solution: This is really asking "when is (11 | p) =1?" First, 11 = 3 (mod 4). To use LQR, consider two cases p = 1 or 3 (mod 4): p=1 We have 1 = (11 | p) = (p | 11), so p is a quadratic residue modulo 11. By brute force: 121, 224, 3² = 9, 4² = 5, 5² = 3 (mod 11) so the quadratic residues mod 11 are 1,3,4,5,9. Using CRT for p = 1 (mod 4) & p = 1,3,4,5,9 (mod 11). p = 1 (mod 4) & p = 1 (mod 11 gives p 1 (mod 44). p = 1 (mod 4) & p = 3 (mod 11) gives p25 (mod 44). p = 1 (mod 4) & p = 4 (mod 11) gives p=37 (mod 44). p = 1 (mod 4) & p = 5 (mod 11) gives p 5 (mod 44). p = 1 (mod 4) & p=9 (mod 11) gives p 9 (mod 44). So p =1,5,9,25,37 (mod 44).arrow_forwardCan you answer this question and give step by step and why and how to get it. Can you write it (numerical method)arrow_forward
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