Sampling Methods in Statistics

Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates.  The registrar randomly selects 100 names from each of the four past graduating classes.

• systematic

• convenience

• stratified

• simple random

Identify the sampling method:

A community college student interviews the first 100 students to enter the building to determine the percentage of students that own a car.

• Quota

• Stratified

• Cluster

• Convenience

if Kent Lester conducted a research in PCF, he collected the data through listing all students. In every 4rth term on his list, he will interview that student, what methods he used?

• random sampling

• systematic sampling

• stratified sampling

• cluster sampling

You have probably seen the mall interviewer, clipboard in hand, approaching people passing by. To estimate the mean amount of money that city residents plan to spend on holiday gifts, the interviewer surveys 100 mall shoppers. Why is this sampling method is biased?

• The sampling method (convenience sampling) is biased because the people at the mall are there to spend money.

• The sampling method (convenience sampling) is biased because this is an observational study. 

• The sampling method (voluntary response sampling) is biased because the people at the mall are there to spend money.

• The sampling method (voluntary response sampling) is biased because this is an observational study.

Explain why this sampling method is biased.

• This sampling method (voluntary response sampling) is biased because it is likely that the customers who chose to leave reviews feel strongly about the hotel, often due to a bad experience. 

• This sampling method (convenience sampling) is biased because it is likely that the customers who chose to leave reviews feel strongly about the hotel, often due to a bad experience. 

• The sampling method (voluntary response sampling) is biased because this is an observational study.

• This sampling method (convenience sampling) is biased because it is likely that the customers that chose to leave reviews feel strongly about the hotel, often due to a bad experience. 

Sammy wants to know what percent of students at her high school have a driver’s license. She surveys all students in her statistics class and finds that 68% of the students in her sample have a driver’s license. What type of sample did Sammy obtain?

• A random sample

• Voluntary response sample

• Convenience sample

• A census

Identify the sampling method:

1. Charles, the host of a radio show, asked his listeners to call in and tell him what they thought about school uniforms.  

• Voluntary

• Convience

• Simple Random Sample

• Cluster

• Stratified

Identify the sampling method:

1. Mrs. Walker put all the students’ cell phones in a box and shook the box up really well,

2. being sure to shake it vigorously for a very long time. Then she opened the box and tipped it over until 5 fell out.

• Voluntary

• Convience

• Simple Random Sample

• Cluster

• Systematic

Identify the sampling method:

• Voluntary

• Simple Random Sample

• Stratified

• Cluster

• Systematic

Identify the sampling method:

Caleb put a poll question on his Snap Chat.

• Voluntary

• Simple Random Sample

• Stratified

• Cluster

• Systematic