Sampling Techniques

What type of sampling?  A journalist asks his family how they feel about water pollution.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling? Twenty-five students are randomly selected from each grade level at a high school and surveyed about their study habits.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling? Calling randomly generated telephone numbers, a study asked 1001 US adults which medical conditions could be prevented by their diet.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling?Soybeans are planted ona 48-acre field.  The field is divided into one acre subplots.  A sample of plants is taken from each subplot to estimate the harvest.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling?  A student asks 12 friends to participate in a psychology experiment. 

• Random sample
• Convenience sample
• Stratified Random sample
• Census

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

What type of sampling?  Law enforcement officials use a radar gun to measure the speed of every 5th vehicle on an interstate.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling?  A journalist interviews all 123 people after they leave a restaurant and asks them how confident they are that the food is safe.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling?  A study on attitudes about smoking is conducted at Otterbein College.  Students are divided by class (freshman, sophomore, junior, senior).  Then a random sample is selected from each class and interviewed.

• Random sample
• Convenience sample
• Stratified Random sample
• Census

What type of sampling? For quality assurance, every 10th engine part is selected from an assembly line and tested for durability.

• Random sample
• Convenience sample
• Stratified Random sample
• Census