WGU C955 PROBABILITY AND
STATISTICS
OBJECTIVE ASSESSMENT
EXAM
, 1. Please complete the following statement so that it is true: −5000 is
a) greater than −3000 b) greater than 0 c) less than −7000 d) less than 0 .
Feedback: The correct answer is d. −5000 is to the left of 0 . Therefore, it is less than 0
.
2. Select the true statement from the following:
a) 0.15 is between 0.138 and 0.149 b) 0.22 is between 0.23 and 0.24 .
c) 0.34 is between 0.335 and 0.35 . d) 0.46 is between 0.465 and 0.468 .
3. Please complete the following to make a true statement: 4.44... is a(an)
a) integer. b) only a real number. c) rational number. d) whole number.
Feedback: The correct answer is c. 4.44... is a repeating decimal and a rational number
because it can be written as a fraction.
4. Which set of data is discrete?
a) Speed of a car b) Weight of a dog c) Adults in a household d) Time to go to
bed
Feedback: The correct answer is c. The number of adults in a household contains gaps and
is discrete.
5. Please evaluate the following expression: 81−−√
a) 6 b) 7 c) 8 d) 9
Feedback: The correct answer is d. 81−−√=9 .
6. What are all of the positive factors of 72 ?
c) 1,2,3,4,6,8,9,12,18,24,36,72
7. What is the greatest common factor of 60 and 80 ?
a) 10 b) 20 c) 30 d) 40
8. Please evaluate the following expression: 18−9+22−15
a) 14 b) 16 c) 24 d) 26
9. Display x less than or equal to 4 using interval notation.
b) (−∞,4]
Feedback: The correct answer is b. All values less than or equal to 4 are true for the
inequality. Less than or equal to is denoted by a bracket and denotes that the value
alongside it, in this example 4 , is to be included. Also, the infinity symbol is always
paired with a parenthesis rather than a bracket. Therefore, (−∞,4] is the interval notation.
10. Which number is a prime number?
a) 21 b) 22 c) 23 d) 24
11. Please evaluate the following expression using order of operations: 42−8+10
b) 18
, 12. Please evaluate the following expression: −36÷3
a) −13 b) −12 c) 12 d) 13
13. Please evaluate the following expression: 32+19
a) 40 b) 41 c) 50 d) 51
14. Please evaluate the following exponential expression: 103
a) 10 b) 30 c) 300 d) 1000
15. A coin is flipped 4 times. How many different outcomes are there?
a) 8 b) 16 c) 32 d) 64
Feedback: The correct answer is b. The base is 2 (the number of outcomes) and the
exponent is 4 (the number of flips). 24=2×2×2×2=16 .
16. A runner runs 14.5 miles, 12.25 miles, 21.75 miles, and 20.8 miles. What is an
accurate estimate for the total number of miles?
a) 65 b) 67 c) 70 d) 74
Feedback: The correct answer is c. The estimated number of miles is 15+12+22+21=70
miles.
17. Please evaluate the following expression: 14−21+(−3)
a) −10 b) −4 c) 4 d) 10
18. What is the prime factorization of 36 ?
a) 2×3 b) 2×2×3 c) 2×3×3 d) 2×2×3×3
19. Please evaluate the following expression: 18×7
a) 74 b) 76 c) 124 d) 126
20. Please evaluate the following expression using order of operations: 8+(6−3)2
a) 14 b) 17 c) 31 d) 35
1. Which number is a composite number?
a) 71 b) 73 c) 77 d) 79
2. Please evaluate the following expression: 42−16+21−17
a) 28 b) 30 c) 38 d) 42
3. Select the true statement from the following:
a) −4.5 is between −4 and −5. b) −3.8 is between −3 and −2.
c) −2.3 is between −2 and −1. d) −1.2 is between −1 and 0.
4. What are all of the positive factors of 80?
a) 1,2,40,80 b) 1,2,4,5,8,10,16,20,40, c) 1,2,4,10,20,40,50,60,80 d)
1,2,4,5,10,20,40,50,60,80
5. Please evaluate the following expression: 64÷4
a) 4 b) 8 c) 16 d) 32
, 6. What is the greatest common factor of 30 and 48?
a) 2 b) 4 c) 6 d) 8
7. Please complete the following to make a true statement: 3–√ is a(an)
a) integer. b) only a real number. c) rational number. d) whole number.
Feedback: The correct answer is b. 3–√ is only a real number. Its complete decimal
expansion goes on forever without repeating.
8. On the number line below, which letter is the greatest value? Number line with letters A
through D placed from right to left, starting with the letter D.
a) A b) B c) C d) D
9. Display x is greater than −5 using interval notation.
a) (−∞,−5) b) (−∞,−5] c) (−5,∞) d) [−5,∞)
Feedback: The correct answer is c. All values greater than −5 are true for the inequality.
Greater than is denoted by a parenthesis and denotes that the value alongside it, in this
example −5, is not to be included. The infinity symbol is always paired with a parenthesis,
rather than a bracket. Therefore, (−5,∞) is the interval notation.
10. Please evaluate the following expression: −6×−5×−4
a) −120 b) −100 c) 100 d) 120
11. Cori is in charge of ordering tablecloths for two dining rooms of the inn that she
manages. The first dining room has 37 tables, and the second dining room has 41. Each
tablecloth is generally changed twice a day. What is a good estimate of the total number of
tablecloths she will need each day?
a) 35×2 b) (35+35)×2 c) (35+40)×2 d) (40+40)×2
12. Which set of numbers is continuous?
a) integer b) rational c) real d) whole
Feedback: The correct answer is c. The set of real numbers contains no gaps and is
continuous.
13. Please evaluate the following expression: 24−(−15)−17
a) −26 b) −22 c) 22 d) 26
14. What is the prime factorization of 52?
a) 2×13 b) 2×2×13 c) 2×2×2×13 d) 2×2×2×2×13
15. Please evaluate the following expression: 84−27
a) 53 b) 57 c) 63 d) 67
16. Please evaluate the following expression: 225−−−√
a) 14 b) 15 c) 16 d) 17
17. Please evaluate the following expression: 25÷(3+2)2+20
a) 21 b) 30 c) 45 d) 57
18. Please evaluate the following expression: (−4)2
STATISTICS
OBJECTIVE ASSESSMENT
EXAM
, 1. Please complete the following statement so that it is true: −5000 is
a) greater than −3000 b) greater than 0 c) less than −7000 d) less than 0 .
Feedback: The correct answer is d. −5000 is to the left of 0 . Therefore, it is less than 0
.
2. Select the true statement from the following:
a) 0.15 is between 0.138 and 0.149 b) 0.22 is between 0.23 and 0.24 .
c) 0.34 is between 0.335 and 0.35 . d) 0.46 is between 0.465 and 0.468 .
3. Please complete the following to make a true statement: 4.44... is a(an)
a) integer. b) only a real number. c) rational number. d) whole number.
Feedback: The correct answer is c. 4.44... is a repeating decimal and a rational number
because it can be written as a fraction.
4. Which set of data is discrete?
a) Speed of a car b) Weight of a dog c) Adults in a household d) Time to go to
bed
Feedback: The correct answer is c. The number of adults in a household contains gaps and
is discrete.
5. Please evaluate the following expression: 81−−√
a) 6 b) 7 c) 8 d) 9
Feedback: The correct answer is d. 81−−√=9 .
6. What are all of the positive factors of 72 ?
c) 1,2,3,4,6,8,9,12,18,24,36,72
7. What is the greatest common factor of 60 and 80 ?
a) 10 b) 20 c) 30 d) 40
8. Please evaluate the following expression: 18−9+22−15
a) 14 b) 16 c) 24 d) 26
9. Display x less than or equal to 4 using interval notation.
b) (−∞,4]
Feedback: The correct answer is b. All values less than or equal to 4 are true for the
inequality. Less than or equal to is denoted by a bracket and denotes that the value
alongside it, in this example 4 , is to be included. Also, the infinity symbol is always
paired with a parenthesis rather than a bracket. Therefore, (−∞,4] is the interval notation.
10. Which number is a prime number?
a) 21 b) 22 c) 23 d) 24
11. Please evaluate the following expression using order of operations: 42−8+10
b) 18
, 12. Please evaluate the following expression: −36÷3
a) −13 b) −12 c) 12 d) 13
13. Please evaluate the following expression: 32+19
a) 40 b) 41 c) 50 d) 51
14. Please evaluate the following exponential expression: 103
a) 10 b) 30 c) 300 d) 1000
15. A coin is flipped 4 times. How many different outcomes are there?
a) 8 b) 16 c) 32 d) 64
Feedback: The correct answer is b. The base is 2 (the number of outcomes) and the
exponent is 4 (the number of flips). 24=2×2×2×2=16 .
16. A runner runs 14.5 miles, 12.25 miles, 21.75 miles, and 20.8 miles. What is an
accurate estimate for the total number of miles?
a) 65 b) 67 c) 70 d) 74
Feedback: The correct answer is c. The estimated number of miles is 15+12+22+21=70
miles.
17. Please evaluate the following expression: 14−21+(−3)
a) −10 b) −4 c) 4 d) 10
18. What is the prime factorization of 36 ?
a) 2×3 b) 2×2×3 c) 2×3×3 d) 2×2×3×3
19. Please evaluate the following expression: 18×7
a) 74 b) 76 c) 124 d) 126
20. Please evaluate the following expression using order of operations: 8+(6−3)2
a) 14 b) 17 c) 31 d) 35
1. Which number is a composite number?
a) 71 b) 73 c) 77 d) 79
2. Please evaluate the following expression: 42−16+21−17
a) 28 b) 30 c) 38 d) 42
3. Select the true statement from the following:
a) −4.5 is between −4 and −5. b) −3.8 is between −3 and −2.
c) −2.3 is between −2 and −1. d) −1.2 is between −1 and 0.
4. What are all of the positive factors of 80?
a) 1,2,40,80 b) 1,2,4,5,8,10,16,20,40, c) 1,2,4,10,20,40,50,60,80 d)
1,2,4,5,10,20,40,50,60,80
5. Please evaluate the following expression: 64÷4
a) 4 b) 8 c) 16 d) 32
, 6. What is the greatest common factor of 30 and 48?
a) 2 b) 4 c) 6 d) 8
7. Please complete the following to make a true statement: 3–√ is a(an)
a) integer. b) only a real number. c) rational number. d) whole number.
Feedback: The correct answer is b. 3–√ is only a real number. Its complete decimal
expansion goes on forever without repeating.
8. On the number line below, which letter is the greatest value? Number line with letters A
through D placed from right to left, starting with the letter D.
a) A b) B c) C d) D
9. Display x is greater than −5 using interval notation.
a) (−∞,−5) b) (−∞,−5] c) (−5,∞) d) [−5,∞)
Feedback: The correct answer is c. All values greater than −5 are true for the inequality.
Greater than is denoted by a parenthesis and denotes that the value alongside it, in this
example −5, is not to be included. The infinity symbol is always paired with a parenthesis,
rather than a bracket. Therefore, (−5,∞) is the interval notation.
10. Please evaluate the following expression: −6×−5×−4
a) −120 b) −100 c) 100 d) 120
11. Cori is in charge of ordering tablecloths for two dining rooms of the inn that she
manages. The first dining room has 37 tables, and the second dining room has 41. Each
tablecloth is generally changed twice a day. What is a good estimate of the total number of
tablecloths she will need each day?
a) 35×2 b) (35+35)×2 c) (35+40)×2 d) (40+40)×2
12. Which set of numbers is continuous?
a) integer b) rational c) real d) whole
Feedback: The correct answer is c. The set of real numbers contains no gaps and is
continuous.
13. Please evaluate the following expression: 24−(−15)−17
a) −26 b) −22 c) 22 d) 26
14. What is the prime factorization of 52?
a) 2×13 b) 2×2×13 c) 2×2×2×13 d) 2×2×2×2×13
15. Please evaluate the following expression: 84−27
a) 53 b) 57 c) 63 d) 67
16. Please evaluate the following expression: 225−−−√
a) 14 b) 15 c) 16 d) 17
17. Please evaluate the following expression: 25÷(3+2)2+20
a) 21 b) 30 c) 45 d) 57
18. Please evaluate the following expression: (−4)2
