Math 1080: Introduction to Statistics Midterm
questions– Expert Strategies| Accurate Verified
Questions & Answers| Guaranteed Success| 2025-
2026
Determine whether the sampling method described below appears
to be sound or is flawed.
In a survey of 538 subjects, the following question was posted
on a newspaper's website: "In your view, are nuclear
plants safe?" The survey subjects were Internet users who
chose to respond to the question posted on the electronic edition
of the newspaper.
solution
- It is flawed because it is a voluntary response sample.
Which of the following is NOT a voluntary response sample?
solution
- Quiz scores from a college level statistics course are analyzed to
determine student progress.
Determine whether the underlined number is a statistic or a
parameter.
In a study of all 2669 students at a college, it is found that 25%
own a computer
solution
- Parameter because the value is a numerical measurement
describing a characteristic of a population
State whether the data described below are discrete or
continuous, and explain why.
The heights of trees in a forest
solution
- The data are continuous because the data can take on any value
in an interval
State whether the data described below are discrete or
continuous, and explain why.
1
,The exact ages in hours of different cockroaches found in a certain
city.
solution
- The data are continuous because the data can take on any value
in an interval
Determine which of the four levels of measurement (nominal,
ordinal, interval, ratio) is most appropriate.
Makes of computers
solution
- Nominal
Determine which of the four levels of measurement (nominal,
ordinal, interval, ratio) is most appropriate.
Flight numbers
solution
The nominal level of measurement is most appropriate because
the data cannot be ordered.
which of the following is NOT a level of measurement?
Ratio
Nominal
Quantitative
Ordinal
solution
- Quantitative
Determine whether the description corresponds to an
observational study or an experiment.
Fifty patients with colon cancer are divided into two groups. One
groups receives an experimental drug to fight cancer, the other a
placebo. After one year, the spread of the cancer is measured.
solution
- Experiment
Identify the type of sampling used (random, systematic,
convenience, stratified, or cluster sampling) in the situation
described below.
2
, A researcher selects every 585th social security number and
surveys the corresponding person
solution
- Systematic sampling
Identify the type of sampling used (random, systematic,
convenience, stratified, or cluster sampling) in the situation
described below.
In a poll conducted by a certain research center, 893 adults were
called after their telephone numbers were randomly generated by
a computer and 37% were able to correctly identify the president
Which type of sampling did the research center use.
solution
- Random sampling
Identify the lower class limits, upper class limits, class width,
class midpoints, and class boundaries for the given frequency
distribution. Also identify the number of individuals included in the
summary.
Age (yr) when award was won | Frequency
15 to 19 | 27
20 to 24 | 33
25 to 29 | 12
30 to 34 | 4
35 to 39 | 5
40 to 44 | 2
45 to 49 | 1
solution
- Identify the lower class limits: 15, 20, 25, 30, 35, 40, 45,
- Identify the upper class limits:
19,24,29,34,39,44,49
- Identify the class width: 5
- Identify the class midpoints: 17, 22, 27, 32, 37, 42, 47
- identify the class boundaries: 14.5, 19.5, 24.5, 34.5, 39.5, 44.5,
49.5
3
questions– Expert Strategies| Accurate Verified
Questions & Answers| Guaranteed Success| 2025-
2026
Determine whether the sampling method described below appears
to be sound or is flawed.
In a survey of 538 subjects, the following question was posted
on a newspaper's website: "In your view, are nuclear
plants safe?" The survey subjects were Internet users who
chose to respond to the question posted on the electronic edition
of the newspaper.
solution
- It is flawed because it is a voluntary response sample.
Which of the following is NOT a voluntary response sample?
solution
- Quiz scores from a college level statistics course are analyzed to
determine student progress.
Determine whether the underlined number is a statistic or a
parameter.
In a study of all 2669 students at a college, it is found that 25%
own a computer
solution
- Parameter because the value is a numerical measurement
describing a characteristic of a population
State whether the data described below are discrete or
continuous, and explain why.
The heights of trees in a forest
solution
- The data are continuous because the data can take on any value
in an interval
State whether the data described below are discrete or
continuous, and explain why.
1
,The exact ages in hours of different cockroaches found in a certain
city.
solution
- The data are continuous because the data can take on any value
in an interval
Determine which of the four levels of measurement (nominal,
ordinal, interval, ratio) is most appropriate.
Makes of computers
solution
- Nominal
Determine which of the four levels of measurement (nominal,
ordinal, interval, ratio) is most appropriate.
Flight numbers
solution
The nominal level of measurement is most appropriate because
the data cannot be ordered.
which of the following is NOT a level of measurement?
Ratio
Nominal
Quantitative
Ordinal
solution
- Quantitative
Determine whether the description corresponds to an
observational study or an experiment.
Fifty patients with colon cancer are divided into two groups. One
groups receives an experimental drug to fight cancer, the other a
placebo. After one year, the spread of the cancer is measured.
solution
- Experiment
Identify the type of sampling used (random, systematic,
convenience, stratified, or cluster sampling) in the situation
described below.
2
, A researcher selects every 585th social security number and
surveys the corresponding person
solution
- Systematic sampling
Identify the type of sampling used (random, systematic,
convenience, stratified, or cluster sampling) in the situation
described below.
In a poll conducted by a certain research center, 893 adults were
called after their telephone numbers were randomly generated by
a computer and 37% were able to correctly identify the president
Which type of sampling did the research center use.
solution
- Random sampling
Identify the lower class limits, upper class limits, class width,
class midpoints, and class boundaries for the given frequency
distribution. Also identify the number of individuals included in the
summary.
Age (yr) when award was won | Frequency
15 to 19 | 27
20 to 24 | 33
25 to 29 | 12
30 to 34 | 4
35 to 39 | 5
40 to 44 | 2
45 to 49 | 1
solution
- Identify the lower class limits: 15, 20, 25, 30, 35, 40, 45,
- Identify the upper class limits:
19,24,29,34,39,44,49
- Identify the class width: 5
- Identify the class midpoints: 17, 22, 27, 32, 37, 42, 47
- identify the class boundaries: 14.5, 19.5, 24.5, 34.5, 39.5, 44.5,
49.5
3
