MATH 225N WEEK 1 ASSIGNMENT SAMPLING METHODS –
QUESTIONS AND ANSWERS
Questions
1. Assume that 80 houses are present in the form of a grid consisting of 10
columns
and 8 rows. If a loud speaker is placed just before the first row, which sampling
method works
the best to select a sample of houses if we want to get an estimate of the
average loudness (measured in decibels) near all the 80 houses?
Select the correct answer below:
Simple Random Sampling
Stratified Sampling using the rows of the houses
as strata Cluster Sampling using the rows of the
houses as clusters Convenience Sampling
2.Angela is studying the mean blood pressure of all students attending her college.
She collects data
from the 38 students in her statistics class. Which type of sampling is used?
Select the correct answer below:
Cluster
sampling
Stratified
sampling
Systematic
sampling
Convenience
sampling
, 3. A town planner is interested in getting some demographic data about the households
in the city. The city has four wards with the following numbers of households: ward A
has 2,107, ward B has 903, ward C has 1,505, and ward D has 1,499. The
budget for the project allows the planner to
survey 100 households. She plans to use a stratified sampling method. What number
of households should be chosen from ward B? Enter a whole number.
903/2107+903+1505+1499 = 903/6014 x 100 = 15
4. Donald is studying the eating habits of all students attending his school.
He samples the population by dividing the students into groups by grade
level and randomly selecting a proportionate number of students from each
group. He then collects data from the sample. Which type of sampling is
used?
Select the correct answer below:
Systematic sampling
Convenience
sampling Stratified
sampling
Cluster sampling
5. An executive for a large national restaurant chain with multiple locations in each
of 513 counties wants to personally sample the cleanliness of the chain's
restaurants throughout the country by visiting restaurants. The executive
wants a good-quality sample but wants to minimize travel time and expenses.
Which of the following sampling methods would be most appropriate?
Select the correct answer below:
Obtain a convenience sample by visiting the 100 restaurants that are closest to the executive's
office.
Obtain a systematic sample by selecting every 20th restaurant from a list that orders all
restaurants by date of opening.
Obtain a stratified sample by visiting 1 randomly selected restaurant in every county.
Obtain a cluster sample by randomly selecting 20 counties and visiting every restaurant within
those counties.
QUESTIONS AND ANSWERS
Questions
1. Assume that 80 houses are present in the form of a grid consisting of 10
columns
and 8 rows. If a loud speaker is placed just before the first row, which sampling
method works
the best to select a sample of houses if we want to get an estimate of the
average loudness (measured in decibels) near all the 80 houses?
Select the correct answer below:
Simple Random Sampling
Stratified Sampling using the rows of the houses
as strata Cluster Sampling using the rows of the
houses as clusters Convenience Sampling
2.Angela is studying the mean blood pressure of all students attending her college.
She collects data
from the 38 students in her statistics class. Which type of sampling is used?
Select the correct answer below:
Cluster
sampling
Stratified
sampling
Systematic
sampling
Convenience
sampling
, 3. A town planner is interested in getting some demographic data about the households
in the city. The city has four wards with the following numbers of households: ward A
has 2,107, ward B has 903, ward C has 1,505, and ward D has 1,499. The
budget for the project allows the planner to
survey 100 households. She plans to use a stratified sampling method. What number
of households should be chosen from ward B? Enter a whole number.
903/2107+903+1505+1499 = 903/6014 x 100 = 15
4. Donald is studying the eating habits of all students attending his school.
He samples the population by dividing the students into groups by grade
level and randomly selecting a proportionate number of students from each
group. He then collects data from the sample. Which type of sampling is
used?
Select the correct answer below:
Systematic sampling
Convenience
sampling Stratified
sampling
Cluster sampling
5. An executive for a large national restaurant chain with multiple locations in each
of 513 counties wants to personally sample the cleanliness of the chain's
restaurants throughout the country by visiting restaurants. The executive
wants a good-quality sample but wants to minimize travel time and expenses.
Which of the following sampling methods would be most appropriate?
Select the correct answer below:
Obtain a convenience sample by visiting the 100 restaurants that are closest to the executive's
office.
Obtain a systematic sample by selecting every 20th restaurant from a list that orders all
restaurants by date of opening.
Obtain a stratified sample by visiting 1 randomly selected restaurant in every county.
Obtain a cluster sample by randomly selecting 20 counties and visiting every restaurant within
those counties.
