MATH 110 Module ALL MODULES (1, 2, 3, 4, 5, 6, 7,
8, 9, 10) Exam / MATH110 Introduction to
Statistics: Portage Learning
1. What type of data is the number of children in a household?
a) Nominal
b) Ordinal
c) Discrete
d) Continuous
Discrete data consists of countable, distinct values, such as whole
numbers of children.
2. Which measure of central tendency is most affected by extreme values?
a) Mode
b) Mean
c) Median
d) Range
The mean is sensitive to outliers and can be skewed by extreme
values.
3. What is the median of the following data set: 2, 7, 4, 9, 1?
a) 4
b) 4
, c) 5
d) 6
When ordered (1, 2, 4, 7, 9), the median is the middle number, 4.
4. What is the mode of the following data set: 3, 5, 3, 7, 8, 5, 5?
a) 3
b) 7
c) 5
d) 8
5 appears most frequently—three times.
5. A bell-shaped, symmetric histogram suggests what type of distribution?
a) Skewed left
b) Uniform
c) Normal
d) Bimodal
Bell-shaped and symmetric histograms indicate a normal
distribution.
6. What is the range of the data set: 12, 5, 19, 7, 3?
a) 15
b) 17
c) 16
d) 14
Range = Max - Min = 19 - 3 = 16.
,7. If P(A) = 0.3, P(B) = 0.5, and A and B are mutually exclusive, what is P(A or
B)?
a) 0.2
b) 0.8
c) 0.3 + 0.5 = 0.8
d) 1.0
For mutually exclusive events: P(A or B) = P(A) + P(B).
8. Which of the following is a continuous variable?
a) Number of pets
b) Height of students
c) Number of cars in a lot
d) Number of classes
Height is measured and can take infinitely many values, making it
continuous.
9. The interquartile range (IQR) is:
a) Q3 + Q1
b) Q3 - Q1
c) Mean - Mode
d) Maximum - Minimum
IQR measures the spread of the middle 50% of the data.
10.What is the standard deviation of a data set used to measure?
a) Center
b) Spread
c) Skewness
, d) Mode
Standard deviation quantifies the average distance from the
mean.
11.What does a z-score of 0 indicate?
a) The value is above average
b) The value is below average
c) The value is exactly at the mean
d) The value is an outlier
A z-score of 0 means the value is equal to the mean.
12.A normal distribution is defined by:
a) Its center only
b) Its range and quartiles
c) Its mean and standard deviation
d) Its skew and kurtosis
Normal distributions are completely characterized by the mean
and standard deviation.
13.Which of the following is an example of nominal data?
a) Weight
b) Temperature
c) Blood type
d) Age
Nominal data represents categories without any order.
8, 9, 10) Exam / MATH110 Introduction to
Statistics: Portage Learning
1. What type of data is the number of children in a household?
a) Nominal
b) Ordinal
c) Discrete
d) Continuous
Discrete data consists of countable, distinct values, such as whole
numbers of children.
2. Which measure of central tendency is most affected by extreme values?
a) Mode
b) Mean
c) Median
d) Range
The mean is sensitive to outliers and can be skewed by extreme
values.
3. What is the median of the following data set: 2, 7, 4, 9, 1?
a) 4
b) 4
, c) 5
d) 6
When ordered (1, 2, 4, 7, 9), the median is the middle number, 4.
4. What is the mode of the following data set: 3, 5, 3, 7, 8, 5, 5?
a) 3
b) 7
c) 5
d) 8
5 appears most frequently—three times.
5. A bell-shaped, symmetric histogram suggests what type of distribution?
a) Skewed left
b) Uniform
c) Normal
d) Bimodal
Bell-shaped and symmetric histograms indicate a normal
distribution.
6. What is the range of the data set: 12, 5, 19, 7, 3?
a) 15
b) 17
c) 16
d) 14
Range = Max - Min = 19 - 3 = 16.
,7. If P(A) = 0.3, P(B) = 0.5, and A and B are mutually exclusive, what is P(A or
B)?
a) 0.2
b) 0.8
c) 0.3 + 0.5 = 0.8
d) 1.0
For mutually exclusive events: P(A or B) = P(A) + P(B).
8. Which of the following is a continuous variable?
a) Number of pets
b) Height of students
c) Number of cars in a lot
d) Number of classes
Height is measured and can take infinitely many values, making it
continuous.
9. The interquartile range (IQR) is:
a) Q3 + Q1
b) Q3 - Q1
c) Mean - Mode
d) Maximum - Minimum
IQR measures the spread of the middle 50% of the data.
10.What is the standard deviation of a data set used to measure?
a) Center
b) Spread
c) Skewness
, d) Mode
Standard deviation quantifies the average distance from the
mean.
11.What does a z-score of 0 indicate?
a) The value is above average
b) The value is below average
c) The value is exactly at the mean
d) The value is an outlier
A z-score of 0 means the value is equal to the mean.
12.A normal distribution is defined by:
a) Its center only
b) Its range and quartiles
c) Its mean and standard deviation
d) Its skew and kurtosis
Normal distributions are completely characterized by the mean
and standard deviation.
13.Which of the following is an example of nominal data?
a) Weight
b) Temperature
c) Blood type
d) Age
Nominal data represents categories without any order.
