MATH 225N week 1 sampling questions and anwers
,Sampling
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 has1,505, 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?
,Sampling
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 has1,505, 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?
