MATH 225 WEEK 3 EXAM PREP – 250
VERIFIED QUESTIONS & ANSWERS
(CHAMBERLAIN UNIVERSITY,
2026/2027) | ACADEMIC YEAR - | MOST
RECENT!!
1. QUESTION 1
Find the mean of the following set of data: 12, 15, 18, 20, 22, 25, 28, 30, 32.
A) 20
B) 22
C) 24
D) 25
Answer: B) 22
2. QUESTION 2
A teacher randomly selects 10 out of her 30 students and finds that the mean
height of those 10 students is 5'2". Is this a sample mean or a population
mean, and which symbol would be used to denote it?
A) Population Mean, μ
B) Sample Mean, x̄
C) Population Mean, x̄
D) Sample Mean, μ
Answer: B) Sample Mean, x̄
3. QUESTION 3
Find the median of the following set of data: 3, 7, 9, 12, 15, 18, 21.
A) 9
B) 12
C) 15
D) 18
Answer: B) 12
4. QUESTION 4
Which measure of central tendency is most affected by outliers?
A) Median
B) Mode
C) Mean
D) Range
Answer: C) Mean
5. QUESTION 5
A data set has values: 2, 3, 3, 4, 5, 5, 5, 6, 7, 8. What is the mode?
, A) 3
B) 4
C) 5
D) 6
Answer: C) 5
6. QUESTION 6
For a symmetrical distribution, which of the following is true?
A) Mean < Median < Mode
B) Mean = Median = Mode
C) Mean > Median > Mode
D) Mean ≠ Median ≠ Mode
Answer: B) Mean = Median = Mode
7. QUESTION 7
For a positively skewed (right-skewed) distribution, which of the following is
true?
A) Mean < Median < Mode
B) Mean = Median = Mode
C) Mean > Median > Mode
D) Mode < Median < Mean
Answer: D) Mode < Median < Mean
8. QUESTION 8
For a negatively skewed (left-skewed) distribution, which of the following is
true?
A) Mean < Median < Mode
B) Mean = Median = Mode
C) Mean > Median > Mode
D) Mode < Median < Mean
Answer: A) Mean < Median < Mode
9. QUESTION 9
Find the mean of the following data set: 4, 8, 6, 5, 9, 7, 8.
A) 6.0
B) 6.5
C) 7.0
D) 7.5
Answer: C) 7.0
10. QUESTION 10
The mean of five numbers is 20. If four of the numbers are 18, 22, 19, and 21,
what is the fifth number?
A) 18
B) 19
C) 20
D) 21
Answer: C) 20
,11. QUESTION 11
Find the mode of the following number of cards drawn until an ace appears: 3,
12, 3, 11, 5, 5, 3, 10, 12, 9, 9, 9.
A) 3
B) 5
C) 9
D) 12
Answer: C) 9
12. QUESTION 12
Find the median of the data set: 10, 11, 12, 13, 14, 15.
A) 11
B) 11.5
C) 12.5
D) 13
Answer: C) 12.5
13. QUESTION 13
A data set lists the number of strikes scored per team. The minimum is 2,
Q1=3, median=5, Q3=7, and maximum=14. What is the range?
A) 4
B) 5
C) 12
D) 14
Answer: C) 12
14. QUESTION 14
Find the five-number summary for the following data set: 10, 12, 14, 15, 16, 18,
19.
A) Min=10, Q1=12, Median=15, Q3=18, Max=19
B) Min=10, Q1=13, Median=15, Q3=17, Max=19
C) Min=10, Q1=12, Median=16, Q3=18, Max=19
D) Min=10, Q1=14, Median=15, Q3=17, Max=19
Answer: A) Min=10, Q1=12, Median=15, Q3=18, Max=19
15. QUESTION 15
Given a box-and-whisker plot where the left whisker is longer than the right
whisker, how is the data skewed?
A) Skewed to the left
B) Skewed to the right
C) Symmetric
D) Cannot be determined
Answer: A) Skewed to the left
16. QUESTION 16
In a box-and-whisker plot, where is the median located relative to Q1 and Q3
in a left-skewed distribution?
A) Closer to Q1
, B) Closer to Q3
C) Exactly in the middle
D) Not displayed
Answer: B) Closer to Q3
17. QUESTION 17
Which of the following is NOT a measure of central tendency?
A) Mean
B) Median
C) Mode
D) Standard Deviation
Answer: D) Standard Deviation
18. QUESTION 18
The standard deviation of a data set is a measure of:
A) The center of the data
B) The spread of the data
C) The most frequent value
D) The middle value
Answer: B) The spread of the data
19. QUESTION 19
A data set has a mean of 50 and a standard deviation of 5. Which value would
be considered an outlier if using the typical rule of thumb (more than 2 or 3
standard deviations from the mean)?
A) 55
B) 60
C) 65
D) 45
Answer: C) 65 (Since 50 + 3(5) = 65)
20. QUESTION 20
In a frequency table, how is relative frequency calculated?
A) Frequency × Total
B) Frequency - Total
C) Frequency / Total
D) Total / Frequency
Answer: C) Frequency / Total
21. QUESTION 21
A histogram is best used for which type of data?
A) Qualitative data
B) Quantitative data
C) Categorical data
D) Nominal data
Answer: B) Quantitative data
22. QUESTION 22
What type of distribution has two distinct peaks?
VERIFIED QUESTIONS & ANSWERS
(CHAMBERLAIN UNIVERSITY,
2026/2027) | ACADEMIC YEAR - | MOST
RECENT!!
1. QUESTION 1
Find the mean of the following set of data: 12, 15, 18, 20, 22, 25, 28, 30, 32.
A) 20
B) 22
C) 24
D) 25
Answer: B) 22
2. QUESTION 2
A teacher randomly selects 10 out of her 30 students and finds that the mean
height of those 10 students is 5'2". Is this a sample mean or a population
mean, and which symbol would be used to denote it?
A) Population Mean, μ
B) Sample Mean, x̄
C) Population Mean, x̄
D) Sample Mean, μ
Answer: B) Sample Mean, x̄
3. QUESTION 3
Find the median of the following set of data: 3, 7, 9, 12, 15, 18, 21.
A) 9
B) 12
C) 15
D) 18
Answer: B) 12
4. QUESTION 4
Which measure of central tendency is most affected by outliers?
A) Median
B) Mode
C) Mean
D) Range
Answer: C) Mean
5. QUESTION 5
A data set has values: 2, 3, 3, 4, 5, 5, 5, 6, 7, 8. What is the mode?
, A) 3
B) 4
C) 5
D) 6
Answer: C) 5
6. QUESTION 6
For a symmetrical distribution, which of the following is true?
A) Mean < Median < Mode
B) Mean = Median = Mode
C) Mean > Median > Mode
D) Mean ≠ Median ≠ Mode
Answer: B) Mean = Median = Mode
7. QUESTION 7
For a positively skewed (right-skewed) distribution, which of the following is
true?
A) Mean < Median < Mode
B) Mean = Median = Mode
C) Mean > Median > Mode
D) Mode < Median < Mean
Answer: D) Mode < Median < Mean
8. QUESTION 8
For a negatively skewed (left-skewed) distribution, which of the following is
true?
A) Mean < Median < Mode
B) Mean = Median = Mode
C) Mean > Median > Mode
D) Mode < Median < Mean
Answer: A) Mean < Median < Mode
9. QUESTION 9
Find the mean of the following data set: 4, 8, 6, 5, 9, 7, 8.
A) 6.0
B) 6.5
C) 7.0
D) 7.5
Answer: C) 7.0
10. QUESTION 10
The mean of five numbers is 20. If four of the numbers are 18, 22, 19, and 21,
what is the fifth number?
A) 18
B) 19
C) 20
D) 21
Answer: C) 20
,11. QUESTION 11
Find the mode of the following number of cards drawn until an ace appears: 3,
12, 3, 11, 5, 5, 3, 10, 12, 9, 9, 9.
A) 3
B) 5
C) 9
D) 12
Answer: C) 9
12. QUESTION 12
Find the median of the data set: 10, 11, 12, 13, 14, 15.
A) 11
B) 11.5
C) 12.5
D) 13
Answer: C) 12.5
13. QUESTION 13
A data set lists the number of strikes scored per team. The minimum is 2,
Q1=3, median=5, Q3=7, and maximum=14. What is the range?
A) 4
B) 5
C) 12
D) 14
Answer: C) 12
14. QUESTION 14
Find the five-number summary for the following data set: 10, 12, 14, 15, 16, 18,
19.
A) Min=10, Q1=12, Median=15, Q3=18, Max=19
B) Min=10, Q1=13, Median=15, Q3=17, Max=19
C) Min=10, Q1=12, Median=16, Q3=18, Max=19
D) Min=10, Q1=14, Median=15, Q3=17, Max=19
Answer: A) Min=10, Q1=12, Median=15, Q3=18, Max=19
15. QUESTION 15
Given a box-and-whisker plot where the left whisker is longer than the right
whisker, how is the data skewed?
A) Skewed to the left
B) Skewed to the right
C) Symmetric
D) Cannot be determined
Answer: A) Skewed to the left
16. QUESTION 16
In a box-and-whisker plot, where is the median located relative to Q1 and Q3
in a left-skewed distribution?
A) Closer to Q1
, B) Closer to Q3
C) Exactly in the middle
D) Not displayed
Answer: B) Closer to Q3
17. QUESTION 17
Which of the following is NOT a measure of central tendency?
A) Mean
B) Median
C) Mode
D) Standard Deviation
Answer: D) Standard Deviation
18. QUESTION 18
The standard deviation of a data set is a measure of:
A) The center of the data
B) The spread of the data
C) The most frequent value
D) The middle value
Answer: B) The spread of the data
19. QUESTION 19
A data set has a mean of 50 and a standard deviation of 5. Which value would
be considered an outlier if using the typical rule of thumb (more than 2 or 3
standard deviations from the mean)?
A) 55
B) 60
C) 65
D) 45
Answer: C) 65 (Since 50 + 3(5) = 65)
20. QUESTION 20
In a frequency table, how is relative frequency calculated?
A) Frequency × Total
B) Frequency - Total
C) Frequency / Total
D) Total / Frequency
Answer: C) Frequency / Total
21. QUESTION 21
A histogram is best used for which type of data?
A) Qualitative data
B) Quantitative data
C) Categorical data
D) Nominal data
Answer: B) Quantitative data
22. QUESTION 22
What type of distribution has two distinct peaks?
