MATH 1280 Study Guide
◍ A computer generates 100 random numbers, and 100 people whose
names correspond with the numbers on the list. Determine the type of
sampling used. Answer: A simple random
◍ An automobile producing company operates car dealerships that sell
its cars. In order to assess the service costumers get at the dealerships, a
team from the Customer Relationship Department was assembled. The
team was sent to 20 randomly selected dealerships. Each dealership was
visited once by the team for an entire working day. During a visit the
team interviewed all the customers that arrived at that dealership. One of
the questions that each of the customers were asked is: "Do you
currently possess a car made by our company?" The answers were
marked down as "Yes", "No", or "Refuse to Answer", depending on the
customer's response. The sample in this survey is: Answer: Customers
that arrive at the selected dealerships during the day of visit.
◍ A market researcher polls every tenth person who walks into a store.
Determine the type of sampling used. Answer:
◍ A study was carried out to determine the age, number of times per
week, and the duration (amount of time) of residents using a local park
in San Antonio, Texas. The first house in the neighborhood around the
park was selected randomly, and then the resident of every eighth house
in the neighborhood around the park was interviewed. The appropriate
sampling method that might have been used is: Answer: Systematic
◍ A computer generates 100 random numbers, and 100 people whose
names correspond with the numbers on the list. Determine the type of
sampling used. Answer: A simple random
◍ An automobile producing company operates car dealerships that sell
its cars. In order to assess the service costumers get at the dealerships, a
team from the Customer Relationship Department was assembled. The
team was sent to 20 randomly selected dealerships. Each dealership was
visited once by the team for an entire working day. During a visit the
team interviewed all the customers that arrived at that dealership. One of
the questions that each of the customers were asked is: "Do you
currently possess a car made by our company?" The answers were
marked down as "Yes", "No", or "Refuse to Answer", depending on the
customer's response. The sample in this survey is: Answer: Customers
that arrive at the selected dealerships during the day of visit.
◍ A market researcher polls every tenth person who walks into a store.
Determine the type of sampling used. Answer:
◍ A study was carried out to determine the age, number of times per
week, and the duration (amount of time) of residents using a local park
in San Antonio, Texas. The first house in the neighborhood around the
park was selected randomly, and then the resident of every eighth house
in the neighborhood around the park was interviewed. The appropriate
sampling method that might have been used is: Answer: Systematic
