MATH 110 All Exams STATISTICS - Portage Learning Actual
Exam 2026/2027 – Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass Guaranteed – A+
Graded
SECTION A: MODULE 1 EXAM – INTRODUCTION TO STATISTICS & DATA TYPES
Q1: A researcher collects data on the number of text messages sent daily by 500
college students. What type of variable is "number of text messages"?
A. Qualitative nominal
B. Qualitative ordinal
C. Quantitative discrete [CORRECT]
D. Quantitative continuous
Correct Answer: C
Rationale: The number of text messages is countable (0, 1, 2, 3...), making it discrete
quantitative data. It is not categorical (qualitative) and not continuous, which would
involve measurements on a continuum like time or weight.
Q2: A Portage Learning survey asks students to rate their course satisfaction as "Very
Satisfied," "Satisfied," "Neutral," "Dissatisfied," or "Very Dissatisfied." What level of
measurement is this variable?
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale: The categories have a natural order or ranking, but the intervals between
them are not necessarily equal, making this ordinal. Nominal lacks order, interval has
equal intervals but no true zero, and ratio has a true zero point.
Q3: Which of the following represents a parameter rather than a statistic?
A. The mean height of a sample of 50 students
B. The proportion of all registered voters in a state who support a candidate [CORRECT]
,C. The standard deviation of a random sample of measurements
D. The correlation coefficient calculated from sample data
Correct Answer: B
Rationale: A parameter describes a population characteristic (all registered voters),
while statistics describe sample characteristics. Options A, C, and D are all calculated
from samples, making them statistics.
Q4: A researcher wants to study the study habits of Portage Learning students. She
selects every 25th student from an alphabetical list of all enrolled students. What
sampling method is being used?
A. Simple random sampling
B. Systematic sampling [CORRECT]
C. Stratified sampling
D. Convenience sampling
Correct Answer: B
Rationale: Systematic sampling involves selecting every kth element from a list after a
random start. Simple random would give each student an equal chance without a
pattern, stratified would divide into subgroups first, and convenience would use easily
accessible subjects.
Q5: In an experiment to test the effectiveness of a new drug, neither the patients nor the
doctors know who receives the actual drug versus the placebo. This is an example of:
A. Single-blind study
B. Double-blind study [CORRECT]
C. Cohort study
D. Case-control study
Correct Answer: B
Rationale: When both subjects and researchers are unaware of treatment assignments,
it is a double-blind study, preventing bias. Single-blind means only one party is unaware,
while cohort and case-control are observational study designs, not experiments.
Q6: Which of the following is an example of inferential statistics rather than descriptive
statistics?
A. Calculating the mean age of a sample of patients
B. Creating a bar graph of survey responses
, C. Using sample data to estimate the percentage of all customers who prefer a product
[CORRECT]
D. Computing the standard deviation of test scores
Correct Answer: C
Rationale: Inferential statistics involves making predictions or inferences about a
population based on sample data. Calculating means, creating graphs, and computing
standard deviations of sample data are descriptive statistics.
Q7: A data set classifies students by their major: Biology, Chemistry, Physics, or
Mathematics. What type of data is this?
A. Quantitative continuous
B. Quantitative discrete
C. Qualitative nominal [CORRECT]
D. Qualitative ordinal
Correct Answer: C
Rationale: Major is categorical with no inherent order (Biology is not "higher" or "lower"
than Chemistry), making it nominal qualitative data. It is not numerical, ruling out
quantitative options, and lacks the ranking characteristic of ordinal data.
Q8: Which level of measurement has a true zero point and allows for meaningful ratios?
A. Nominal
B. Ordinal
C. Interval
D. Ratio [CORRECT]
Correct Answer: D
Rationale: Ratio data has a true zero (absence of the quantity) and allows meaningful
ratio comparisons (10 kg is twice as heavy as 5 kg). Interval has equal intervals but no
true zero, ordinal has order but unequal intervals, and nominal is purely categorical.
Q9: A researcher collects data from patients who happen to be available at a clinic
during a specific week. What type of sampling is this?
A. Random sampling
B. Systematic sampling
C. Convenience sampling [CORRECT]
D. Stratified sampling
Correct Answer: C
Exam 2026/2027 – Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass Guaranteed – A+
Graded
SECTION A: MODULE 1 EXAM – INTRODUCTION TO STATISTICS & DATA TYPES
Q1: A researcher collects data on the number of text messages sent daily by 500
college students. What type of variable is "number of text messages"?
A. Qualitative nominal
B. Qualitative ordinal
C. Quantitative discrete [CORRECT]
D. Quantitative continuous
Correct Answer: C
Rationale: The number of text messages is countable (0, 1, 2, 3...), making it discrete
quantitative data. It is not categorical (qualitative) and not continuous, which would
involve measurements on a continuum like time or weight.
Q2: A Portage Learning survey asks students to rate their course satisfaction as "Very
Satisfied," "Satisfied," "Neutral," "Dissatisfied," or "Very Dissatisfied." What level of
measurement is this variable?
A. Nominal
B. Ordinal [CORRECT]
C. Interval
D. Ratio
Correct Answer: B
Rationale: The categories have a natural order or ranking, but the intervals between
them are not necessarily equal, making this ordinal. Nominal lacks order, interval has
equal intervals but no true zero, and ratio has a true zero point.
Q3: Which of the following represents a parameter rather than a statistic?
A. The mean height of a sample of 50 students
B. The proportion of all registered voters in a state who support a candidate [CORRECT]
,C. The standard deviation of a random sample of measurements
D. The correlation coefficient calculated from sample data
Correct Answer: B
Rationale: A parameter describes a population characteristic (all registered voters),
while statistics describe sample characteristics. Options A, C, and D are all calculated
from samples, making them statistics.
Q4: A researcher wants to study the study habits of Portage Learning students. She
selects every 25th student from an alphabetical list of all enrolled students. What
sampling method is being used?
A. Simple random sampling
B. Systematic sampling [CORRECT]
C. Stratified sampling
D. Convenience sampling
Correct Answer: B
Rationale: Systematic sampling involves selecting every kth element from a list after a
random start. Simple random would give each student an equal chance without a
pattern, stratified would divide into subgroups first, and convenience would use easily
accessible subjects.
Q5: In an experiment to test the effectiveness of a new drug, neither the patients nor the
doctors know who receives the actual drug versus the placebo. This is an example of:
A. Single-blind study
B. Double-blind study [CORRECT]
C. Cohort study
D. Case-control study
Correct Answer: B
Rationale: When both subjects and researchers are unaware of treatment assignments,
it is a double-blind study, preventing bias. Single-blind means only one party is unaware,
while cohort and case-control are observational study designs, not experiments.
Q6: Which of the following is an example of inferential statistics rather than descriptive
statistics?
A. Calculating the mean age of a sample of patients
B. Creating a bar graph of survey responses
, C. Using sample data to estimate the percentage of all customers who prefer a product
[CORRECT]
D. Computing the standard deviation of test scores
Correct Answer: C
Rationale: Inferential statistics involves making predictions or inferences about a
population based on sample data. Calculating means, creating graphs, and computing
standard deviations of sample data are descriptive statistics.
Q7: A data set classifies students by their major: Biology, Chemistry, Physics, or
Mathematics. What type of data is this?
A. Quantitative continuous
B. Quantitative discrete
C. Qualitative nominal [CORRECT]
D. Qualitative ordinal
Correct Answer: C
Rationale: Major is categorical with no inherent order (Biology is not "higher" or "lower"
than Chemistry), making it nominal qualitative data. It is not numerical, ruling out
quantitative options, and lacks the ranking characteristic of ordinal data.
Q8: Which level of measurement has a true zero point and allows for meaningful ratios?
A. Nominal
B. Ordinal
C. Interval
D. Ratio [CORRECT]
Correct Answer: D
Rationale: Ratio data has a true zero (absence of the quantity) and allows meaningful
ratio comparisons (10 kg is twice as heavy as 5 kg). Interval has equal intervals but no
true zero, ordinal has order but unequal intervals, and nominal is purely categorical.
Q9: A researcher collects data from patients who happen to be available at a clinic
during a specific week. What type of sampling is this?
A. Random sampling
B. Systematic sampling
C. Convenience sampling [CORRECT]
D. Stratified sampling
Correct Answer: C
