EP MATHEMATICS FOR THE TRADES
11th Edition
ISBN: 9780134758817
Author: SAUNDERS
Publisher: PEARSON CO
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Chapter 6.4, Problem 8BE
Calculate. Round to two decimal places if necessary.
8.
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West Virginia has one of the highest divorce rates in the nation, with an annual rate of approximately 5 divorces per 1000 people (Centers for Disease Control and Prevention website, January 12, 2012). The Marital Counseling Center, Inc. (MCC) thinks that the high divorce rate in the state may require them to hire additional staff.
Working with a consultant, the management of MCC has developed the following probability distribution for x = the number of new clients for marriage counseling for the next year.
Excel File: data05-19.xls
x
10
f(x)
.05
20
30
.10
.10
40
.20
50
60
.35
.20
a. Is this probability distribution valid?
- Select your answer-
Explain.
f(x)
Σf(x)
Select your answer
Select your answer
b. What is the probability MCC will obtain more than 30 new clients (to 2 decimals)?
c. What is the probability MCC will obtain fewer than 20 new clients (to 2 decimals)?
d. Compute the expected value and variance of x.
Expected value
Variance
clients per year
squared clients per year
For unemployed persons in the United States, the average number of months of unemployment at the end of December 2009 was approximately seven months (Bureau of Labor Statistics, January 2010). Suppose the following data are for a particular region in upstate New York. The values in the first column show the number of
months unemployed and the values in the second column show the corresponding number of unemployed persons.
Months
Unemployed
Number
Unemployed
1
1029
2
1686
3
2269
4
2675
5
3487
6
4652
7
4145
8
3587
9
2325
10
1120
Let x be a random variable indicating the number of months a person is unemployed.
a. Use the data to develop an empirical discrete probability distribution for x (to 4 decimals).
(x)
f(x)
1
2
3
4
5
6
7
8
9
10
b. Show that your probability distribution satisfies the conditions for a valid discrete probability distribution.
The input in the box below will not be graded, but may be reviewed and considered by your instructor.
c. What is the probability that a person…
In Gallup's Annual Consumption Habits Poll, telephone interviews were conducted for a random sample of 1014 adults aged 18 and over. One of the questions was "How many cups of coffee, if any, do you drink on an average day?" The following table shows the results obtained (Gallup website, August 6, 2012).
Excel File: data05-23.xls
Number of Cups
per Day
Number of
Responses
0
365
264
193
3
4 or more
91
101
Define a random variable x = number of cups of coffee consumed on an average day. Let x = 4 represent four or more cups.
Round your answers to four decimal places.
a. Develop a probability distribution for x.
x
0
1
2
3
4
f(x)
b. Compute the expected value of x.
cups of coffee
c. Compute the variance of x.
cups of coffee squared
d. Suppose we are only interested in adults that drink at least one cup of coffee on an average day. For this group, let y = the number of cups of coffee consumed on an average day.
Compute the expected value of y.
Compare it to the expected value of x.
The…
Chapter 6 Solutions
EP MATHEMATICS FOR THE TRADES
Ch. 6.1 - If it is 13 below zero and the temperature rises...Ch. 6.1 - Prob. 2LCCh. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...
Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - A. Make each statement true by replacing the ...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - Make each statement true by replacing the symbol...Ch. 6.1 - For each problem, make a separate number line and...Ch. 6.1 - For each problem, make a separate number line and...Ch. 6.1 - For each problem, make a separate number line and...Ch. 6.1 - For each problem, make a separate number line and...Ch. 6.1 - Prob. 1CECh. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Prob. 5CECh. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Prob. 7CECh. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Prob. 9CECh. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Represent each of the following situations with a...Ch. 6.1 - Prob. 12CECh. 6.1 - Prob. 13CECh. 6.1 - C. Represent each of the following situations with...Ch. 6.1 - Prob. 1DECh. 6.1 - Add. 2. 11 + 7Ch. 6.1 - Prob. 3DECh. 6.1 - Prob. 4DECh. 6.1 - Prob. 5DECh. 6.1 - Prob. 6DECh. 6.1 - Prob. 7DECh. 6.1 - Add. 8. 23 + (28)Ch. 6.1 - Prob. 9DECh. 6.1 - Add. 10. 12 + 19Ch. 6.1 - Prob. 11DECh. 6.1 - Prob. 12DECh. 6.1 - Prob. 13DECh. 6.1 - Add. 14. 56 + 29Ch. 6.1 - Prob. 15DECh. 6.1 - Prob. 16DECh. 6.1 - Prob. 17DECh. 6.1 - Prob. 18DECh. 6.1 - Prob. 19DECh. 6.1 - Add. 20. 5.7 + (7.9)Ch. 6.1 - Prob. 21DECh. 6.1 - Prob. 22DECh. 6.1 - Prob. 23DECh. 6.1 - Prob. 24DECh. 6.1 - Prob. 25DECh. 6.1 - Add. 26. 414+634Ch. 6.1 - Add. 27. 912+(412)Ch. 6.1 - Prob. 28DECh. 6.1 - Prob. 29DECh. 6.1 - Prob. 30DECh. 6.1 - Prob. 31DECh. 6.1 - Add. 32. 13310+(845)Ch. 6.1 - Prob. 33DECh. 6.1 - Prob. 34DECh. 6.1 - Prob. 35DECh. 6.1 - Prob. 36DECh. 6.1 - Prob. 37DECh. 6.1 - Add. 38. 11 + (6) + (5)Ch. 6.1 - Prob. 39DECh. 6.1 - Prob. 40DECh. 6.1 - Add. 41. 36 + 45 + 27 + (18)Ch. 6.1 - Prob. 42DECh. 6.1 - Prob. 43DECh. 6.1 - Add. 44. 1+3+(5)+7+(9)+11+(13)+(15)+(17)+19Ch. 6.1 - Prob. 45DECh. 6.1 - Prob. 46DECh. 6.1 - Prob. 47DECh. 6.1 - Prob. 48DECh. 6.1 - Prob. 49DECh. 6.1 - Add. 50. (0.0475)+(0.0875)+(0.0255)Ch. 6.1 - Prob. 1EECh. 6.1 - Practical Applications 2. Sports and Leisure...Ch. 6.1 - Prob. 3EECh. 6.1 - Prob. 4EECh. 6.1 - Practical Applications 5. Business and Finance A...Ch. 6.1 - Prob. 6EECh. 6.1 - Practical Applications 7. Electronics What is the...Ch. 6.1 - Practical Applications 8. Electrical Trades As...Ch. 6.2 - Prob. 1LCCh. 6.2 - Prob. 2LCCh. 6.2 - Prob. 1AECh. 6.2 - Find the value of the following. 2. 7 20Ch. 6.2 - Prob. 3AECh. 6.2 - Prob. 4AECh. 6.2 - Prob. 5AECh. 6.2 - Prob. 6AECh. 6.2 - Prob. 7AECh. 6.2 - Find the value of the following. 8. 22 ( 10)Ch. 6.2 - Prob. 9AECh. 6.2 - Prob. 10AECh. 6.2 - Find the value of the following. 11. 5 ( 16)Ch. 6.2 - Prob. 12AECh. 6.2 - Prob. 13AECh. 6.2 - Find the value of the following. 14. 30 65Ch. 6.2 - Prob. 15AECh. 6.2 - Prob. 16AECh. 6.2 - Prob. 17AECh. 6.2 - Prob. 18AECh. 6.2 - Prob. 19AECh. 6.2 - Find the value of the following. 20. 70 25Ch. 6.2 - Prob. 21AECh. 6.2 - Prob. 22AECh. 6.2 - Prob. 23AECh. 6.2 - Prob. 24AECh. 6.2 - Prob. 25AECh. 6.2 - Find the value of the following. 26. 55 0Ch. 6.2 - Prob. 27AECh. 6.2 - Prob. 28AECh. 6.2 - Prob. 29AECh. 6.2 - Prob. 30AECh. 6.2 - Prob. 31AECh. 6.2 - Find the value of the following. 32. 17 44Ch. 6.2 - Prob. 33AECh. 6.2 - Prob. 34AECh. 6.2 - Prob. 35AECh. 6.2 - Prob. 36AECh. 6.2 - Prob. 37AECh. 6.2 - Find the value of the following. 38. 5 12 + (13) ...Ch. 6.2 - Prob. 39AECh. 6.2 - Find the value of the following. 31. 22 89 32. 17...Ch. 6.2 - Prob. 41AECh. 6.2 - Prob. 42AECh. 6.2 - Prob. 43AECh. 6.2 - Find the value of the following. 44. 212(314)Ch. 6.2 - Prob. 45AECh. 6.2 - Prob. 46AECh. 6.2 - Prob. 47AECh. 6.2 - Prob. 48AECh. 6.2 - Prob. 49AECh. 6.2 - Find the value of the following. 50. (0.275) ...Ch. 6.2 - Prob. 51AECh. 6.2 - Prob. 52AECh. 6.2 - Prob. 53AECh. 6.2 - Prob. 54AECh. 6.2 - Prob. 55AECh. 6.2 - Find the value of the following. 56. (5.8)(818)3.9Ch. 6.2 - Prob. 1BECh. 6.2 - Practical Applications 2. Meteorology The highest...Ch. 6.2 - Prob. 3BECh. 6.2 - Prob. 4BECh. 6.2 - Prob. 5BECh. 6.2 - Prob. 6BECh. 6.2 - Prob. 7BECh. 6.2 - Practical Applications 8. Meteorology The fastest...Ch. 6.2 - Prob. 9BECh. 6.2 - Prob. 10BECh. 6.2 - Prob. 11BECh. 6.2 - Prob. 12BECh. 6.2 - Prob. 13BECh. 6.2 - Practical Applications 14. Meteorology The hottest...Ch. 6.2 - Prob. 15BECh. 6.3 - Prob. 1LCCh. 6.3 - Prob. 2LCCh. 6.3 - Prob. 1AECh. 6.3 - Multiply or divide as indicated. 2. 8 (5)Ch. 6.3 - Prob. 3AECh. 6.3 - Prob. 4AECh. 6.3 - Prob. 5AECh. 6.3 - Prob. 6AECh. 6.3 - Prob. 7AECh. 6.3 - Multiply or divide as indicated. 8. (44)(11)Ch. 6.3 - Multiply or divide as indicated. 9. (3.4)(1.5)Ch. 6.3 - Prob. 10AECh. 6.3 - Prob. 11AECh. 6.3 - Prob. 12AECh. 6.3 - Prob. 13AECh. 6.3 - Multiply or divide as indicated. 14. (10.8)(1.2)Ch. 6.3 - Prob. 15AECh. 6.3 - Prob. 16AECh. 6.3 - Prob. 17AECh. 6.3 - Prob. 18AECh. 6.3 - Prob. 19AECh. 6.3 - Multiply or divide as indicated. 20. (13)(4)Ch. 6.3 - Prob. 21AECh. 6.3 - Prob. 22AECh. 6.3 - Prob. 23AECh. 6.3 - Prob. 24AECh. 6.3 - Prob. 25AECh. 6.3 - Multiply or divide as indicated. 26. (200)(10)Ch. 6.3 - Prob. 27AECh. 6.3 - Prob. 28AECh. 6.3 - Prob. 29AECh. 6.3 - Prob. 30AECh. 6.3 - Prob. 31AECh. 6.3 - Multiply or divide as indicated. 32. (2.25)0.15Ch. 6.3 - Prob. 33AECh. 6.3 - Prob. 34AECh. 6.3 - Prob. 35AECh. 6.3 - Prob. 36AECh. 6.3 - Prob. 37AECh. 6.3 - Multiply or divide as indicated. 38. (8)4(7)Ch. 6.3 - Prob. 39AECh. 6.3 - Prob. 40AECh. 6.3 - Prob. 41AECh. 6.3 - Prob. 42AECh. 6.3 - Prob. 1BECh. 6.3 - Multiply or divide using a calculator and round as...Ch. 6.3 - Prob. 3BECh. 6.3 - Prob. 4BECh. 6.3 - Prob. 5BECh. 6.3 - Prob. 6BECh. 6.3 - Prob. 7BECh. 6.3 - Multiply or divide using a calculator and round as...Ch. 6.3 - Prob. 9BECh. 6.3 - Prob. 10BECh. 6.3 - Prob. 11BECh. 6.3 - Multiply or divide using a calculator and round as...Ch. 6.3 - Prob. 1CECh. 6.3 - Practical Applications 2. Business and Finance In...Ch. 6.3 - Practical Applications 3. Industrial Technology...Ch. 6.3 - Practical Applications 4. Machine Trades A long...Ch. 6.3 - Prob. 5CECh. 6.3 - Prob. 6CECh. 6.4 - What number, multiplied by itself, gives you a...Ch. 6.4 - Prob. 2LCCh. 6.4 - Prob. 1AECh. 6.4 - Find the value of these. 2. 32Ch. 6.4 - Prob. 3AECh. 6.4 - Prob. 4AECh. 6.4 - Prob. 5AECh. 6.4 - Prob. 6AECh. 6.4 - Prob. 7AECh. 6.4 - Find the value of these. 8. 62Ch. 6.4 - Prob. 9AECh. 6.4 - Prob. 10AECh. 6.4 - Prob. 11AECh. 6.4 - Prob. 12AECh. 6.4 - Prob. 13AECh. 6.4 - Find the value of these. 14. (3)5Ch. 6.4 - Prob. 15AECh. 6.4 - Prob. 16AECh. 6.4 - Find the value of these. 17. 51Ch. 6.4 - Prob. 18AECh. 6.4 - Prob. 19AECh. 6.4 - Find the value of these. 20. 82Ch. 6.4 - Prob. 21AECh. 6.4 - Prob. 22AECh. 6.4 - Prob. 23AECh. 6.4 - Prob. 24AECh. 6.4 - Prob. 25AECh. 6.4 - Find the value of these. 26. 2632Ch. 6.4 - Prob. 27AECh. 6.4 - Prob. 28AECh. 6.4 - Prob. 29AECh. 6.4 - Prob. 30AECh. 6.4 - Prob. 31AECh. 6.4 - Find the value of these. 32. 1423Ch. 6.4 - Prob. 33AECh. 6.4 - Prob. 34AECh. 6.4 - Prob. 35AECh. 6.4 - Prob. 36AECh. 6.4 - Prob. 37AECh. 6.4 - Find the value of these. 38. 6442+18Ch. 6.4 - Prob. 39AECh. 6.4 - Prob. 40AECh. 6.4 - Find the value of these. 41. 26+402332Ch. 6.4 - Prob. 42AECh. 6.4 - Prob. 1BECh. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Prob. 3BECh. 6.4 - Prob. 4BECh. 6.4 - Prob. 5BECh. 6.4 - Prob. 6BECh. 6.4 - Prob. 7BECh. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Prob. 9BECh. 6.4 - Prob. 10BECh. 6.4 - Prob. 11BECh. 6.4 - Prob. 12BECh. 6.4 - Prob. 13BECh. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Prob. 16BECh. 6.4 - Prob. 17BECh. 6.4 - Prob. 18BECh. 6.4 - Prob. 19BECh. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Prob. 21BECh. 6.4 - Prob. 22BECh. 6.4 - Prob. 23BECh. 6.4 - Prob. 24BECh. 6.4 - Prob. 25BECh. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Prob. 27BECh. 6.4 - Prob. 28BECh. 6.4 - Prob. 29BECh. 6.4 - Prob. 30BECh. 6.4 - Prob. 31BECh. 6.4 - Calculate. Round to two decimal places if...Ch. 6.4 - Prob. 33BECh. 6.4 - Prob. 34BECh. 6.4 - Prob. 35BECh. 6.4 - Prob. 36BECh. 6.4 - Prob. 37BECh. 6.4 - Prob. 38BECh. 6.4 - Prob. 1CECh. 6.4 - Construction A square building covers an area of...Ch. 6.4 - Mechanical Engineering The following calculation...Ch. 6.4 - Prob. 4CECh. 6.4 - Prob. 5CECh. 6.4 - Prob. 6CECh. 6.4 - Prob. 7CECh. 6.4 - Roofing The length L of a rafter on a shed roof is...Ch. 6.4 - Prob. 9CECh. 6.4 - Prob. 10CECh. 6.4 - Prob. 11CECh. 6.4 - Electrical Trades The electrical resistance of a...Ch. 6.4 - Prob. 13CECh. 6 - Understand the meaning of signed numbers. (a)...Ch. 6 - Add signed numbers. (a) (3)+(5) _____ (b)...Ch. 6 - Subtract signed numbers. (a) 47 _____ (b) 11(3)...Ch. 6 - Multiply and divide signed numbers. (a) (12)6...Ch. 6 - Work with exponents. (a) 43 _____ (b) (2.05)2...Ch. 6 - Use the order of operations. (a) 2+32 _____ (b)...Ch. 6 - Find square roots. (a) 169 _____ (b) 14.5 (to two...Ch. 6 - A. Rewrite each group of numbers in order from...Ch. 6 - A. Rewrite each group of numbers in order from...Ch. 6 - A. Rewrite each group of numbers in order from...Ch. 6 - A. Rewrite each group of numbers in order from...Ch. 6 - Add or subtract as indicated. 1. 16+6Ch. 6 - Prob. 2BPSCh. 6 - Add or subtract as indicated. 3. 7 13Ch. 6 - Prob. 4BPSCh. 6 - Add or subtract as indicated. 5. 23 + (38)Ch. 6 - Prob. 6BPSCh. 6 - B. Add or subtract as indicated. 20 (5)Ch. 6 - Add or subtract as indicated. 8. 11 + (3)Ch. 6 - Add or subtract as indicated. 9. 2.6 + 4.9Ch. 6 - Prob. 10BPSCh. 6 - B. Add or subtract as indicated. 5.26 3.89Ch. 6 - Prob. 12BPSCh. 6 - B. Add or subtract as indicated. 9 6 + 4 + (13) ...Ch. 6 - B. Add or subtract as indicated. 12.4 + 612 (134)...Ch. 6 - Multiply or divide as indicated. 1. 6(10)Ch. 6 - Prob. 2CPSCh. 6 - Multiply or divide as indicated. 3. 48(4)Ch. 6 - Prob. 4CPSCh. 6 - Multiply or divide as indicated. 5. (118)(614)Ch. 6 - Prob. 6CPSCh. 6 - Multiply or divide as indicated. 7. 6.4(16)Ch. 6 - Prob. 8CPSCh. 6 - Multiply or divide as indicated. 9. (4) (5) (6)Ch. 6 - Multiply or divide as indicated. 10. 72(4)(3)Ch. 6 - Multiply or divide as indicated. 11. (2.4735) ...Ch. 6 - Prob. 12CPSCh. 6 - Find the numerical value of each expression. 12.5 ...Ch. 6 - Prob. 2DPSCh. 6 - Find the numerical value of each expression....Ch. 6 - Prob. 4DPSCh. 6 - Find the numerical value of each expression. 5. 26Ch. 6 - Prob. 6DPSCh. 6 - Find the numerical value of each expression. 7....Ch. 6 - Prob. 8DPSCh. 6 - Find the numerical value of each expression. 9....Ch. 6 - Prob. 10DPSCh. 6 - Find the numerical value of each expression. 11....Ch. 6 - Prob. 12DPSCh. 6 - Find the numerical value of each expression. 13....Ch. 6 - Prob. 14DPSCh. 6 - Prob. 15DPSCh. 6 - Prob. 16DPSCh. 6 - Prob. 17DPSCh. 6 - Prob. 18DPSCh. 6 - Prob. 19DPSCh. 6 - Prob. 20DPSCh. 6 - Prob. 21DPSCh. 6 - Prob. 22DPSCh. 6 - Prob. 23DPSCh. 6 - Prob. 24DPSCh. 6 - Prob. 25DPSCh. 6 - Prob. 26DPSCh. 6 - Prob. 27DPSCh. 6 - Prob. 28DPSCh. 6 - Prob. 29DPSCh. 6 - Prob. 30DPSCh. 6 - Prob. 31DPSCh. 6 - Prob. 32DPSCh. 6 - Prob. 33DPSCh. 6 - Prob. 34DPSCh. 6 - Prob. 35DPSCh. 6 - Prob. 36DPSCh. 6 - Prob. 37DPSCh. 6 - Prob. 38DPSCh. 6 - Prob. 39DPSCh. 6 - Prob. 40DPSCh. 6 - Prob. 41DPSCh. 6 - Prob. 42DPSCh. 6 - Prob. 43DPSCh. 6 - Prob. 44DPSCh. 6 - Prob. 45DPSCh. 6 - Prob. 46DPSCh. 6 - Prob. 1EPSCh. 6 - General Trades Find the side of a square whose...Ch. 6 - Prob. 3EPSCh. 6 - E. Practical Applications Trades Management Morgan...Ch. 6 - Prob. 5EPSCh. 6 - Fire Protection The flow rate (in gallons per...Ch. 6 - Prob. 7EPSCh. 6 - Trades Management An auto shop was 14,560 in the...Ch. 6 - Prob. 9EPSCh. 6 - Prob. 10EPSCh. 6 - Prob. 11EPSCh. 6 - Meteorology Use the formula F=9C5+32 to convert...Ch. 6 - Prob. 13EPSCh. 6 - Prob. 14EPSCh. 6 - Prob. 15EPSCh. 6 - Allied Health The following expression gives the...Ch. 6 - Prob. 17EPSCh. 6 - Prob. 18EPSCh. 6 - Prob. 19EPS
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- rounded to two decimal places at each calculationarrow_forwardIn Gallup's Annual Consumption Habits Poll, telephone interviews were conducted for a random sample of 1014 adults aged 18 and over. One of the questions was "How many cups of coffee, if any, do you drink on an average day?" The following table shows the results obtained (Gallup website, August 6, 2012). Excel File: data05-23.xls Number of Cups per Day Number of Responses 0 365 264 193 2 3 4 or more 91 101 Define a random variable x = number of cups of coffee consumed on an average day. Let x = 4 represent four or more cups. Round your answers to four decimal places. a. Develop a probability distribution for x. x 0 1 2 3 f(x) b. Compute the expected value of x. cups of coffee c. Compute the variance of x. cups of coffee squared d. Suppose we are only interested in adults that drink at least one cup of coffee on an average day. For this group, let y = the number of cups of coffee consumed on an average day. Compute the expected value of y. Compare it to the expected value of x. The…arrow_forwardA technician services mailing machines at companies in the Phoenix area. Depending on the type of malfunction, the service call can take 1, 2, 3, or 4 hours. The different types of malfunctions occur at about the same frequency. Develop a probability distribution for the duration of a service call. Duration of Call x f(x) 1 2 3 4 Which of the following probability distribution graphs accurately represents the data set? Consider the required conditions for a discrete probability function, shown below.Does this probability distribution satisfy equation (5.1)?Does this probability distribution satisfy equation (5.2)? What is the probability a service call will take three hours? A service call has just come in, but the type of malfunction is unknown. It is 3:00 P.M. and service technicians usually get off at 5:00 P.M. What is the probability the service technician will have to work overtime to fix the machine today?arrow_forward
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