Types of Sampling

A researcher starts a study on individuals with a rare condition by contacting a few patients and then asking those patients to refer others they know with the same condition. What type of sampling is this?

• Snowball Sampling

• Volunteer Sampling

• Opportunity Sampling

A researcher studying sleep patterns posts an online ad asking people aged 18-30 to volunteer for a study by filling out a survey. What type of sampling is this?

• Snowball Sampling

• Volunteer Sampling

• Opportunity Sampling

A scientist interested in how often people use public transportation stands at a busy bus stop and asks every third person if they would answer a few questions. What type of sampling is this?

• Opportunity Sampling

• Snowball Sampling

• Volunteer Sampling

A researcher starts a study on work-from-home employees by interviewing a few known remote workers and then asking them to suggest other remote workers for the study. What type of sampling is this?

• Opportunity Sampling

• Volunteer Sampling

• Snowball Sampling

An interviewer is researching shopping habits and approaches customers in a shopping mall to ask if they would participate in a quick survey about their purchases. What type of sampling is this?

• Opportunity Sampling

• Snowball Sampling

• Volunteer Sampling

At a local farmers' market, a dietitian sets up a booth and invites passersby to participate in a survey about their fruit and vegetable consumption. What type of sampling is this?

• Opportunity Sampling

• Volunteer Sampling

• Snowball Sampling

For a university study on exam stress, researchers send out emails and post flyers around campus asking any interested students to sign up for the study. What type of sampling is this?

• Volunteer Sampling

• Snowball Sampling

• Opportunity Sampling

To understand the experiences of patients with a rare disease, a researcher begins by interviewing a few patients and then asks each of them to refer other patients they know with the same condition. What type of sampling is this?

• Snowball Sampling

• Volunteer Sampling

• Opportunity Sampling

A fitness app developer sends out a notification to all users, inviting them to join a study on exercise habits if they are interested. Users who want to participate sign up through the app. What type of sampling is this?

• Snowball Sampling

• Volunteer Sampling

• Opportunity Sampling

A researcher studying underground music scenes starts by interviewing a few known local artists and then asks each artist to introduce other artists they know. What type of sampling is this?

• Snowball Sampling

• Volunteer Sampling

• Opportunity Sampling