MDM 4U - Chapter 5 - Type of Study/Variables/Samples

What type of sampling is used in this experiment?

You want to find out if your town is in favour of starting a composting pickup service. You ask everyone on your street.

• Stratified Sample

• Convenience Sample

• Cluster Sample

• Systematic Sample

What type of sampling is used in this experiment?

A university is polling its students. It selects 200 students at random in the same proportions as the enrolment in each department.

• Stratified Sample

• Convenience Sample

• Cluster Sample

• Systematic Sample

What type of sampling is used in this experiment?

There are 139 swim clubs in Ontario. Swim Ontario conducts a survey to vote on its new logo. The organization randomly selects 10 swim clubs and surveys every member in each of those clubs.

• Stratified Sample

• Convenience Sample

• Cluster Sample

• Systematic Sample

What type of sampling is used in this experiment?

A coach puts the names of all the basketball players into a hat and draws one name for a free basketball.

• Simple Random Sample

• Voluntary Sample

• Cluster Sample

• Multistage Sample

What type of sampling is used in this experiment?

A questionnaire is sent to every ninth person on an alphabetical list of a store’s credit card customers. The first person chosen from the list is picked randomly.

• Simple Random Sample

• Voluntary Sample

• Systematic Sample

• Multistage Sample

What type of sampling is used in this experiment?

The student council invites all students to provide ideas for activities.

• Simple Random Sample

• Voluntary Sample

• Systematic Sample

• Multistage Sample

What type of sampling is used in this experiment?

A marketing firm wants to collect information on certain products in a city of 800'000 people. The researchers randomly select 10 neighbourhoods. In each neighbourhood, they randomly select five streets, and on each street they randomly select 10 households.

• Simple Random Sample

• Voluntary Sample

• Systematic Sample

• Multistage Sample

What type of study is this?

A researcher interviews people as they leave the gym and finds that they get fewer colds compared to people who do not go to the gym.

• Inference Study

• Observational Study

• Deductive Study

• Experimental Study

Which of the following is NOT a criterion for an Experimental Study?

• Treatment Groups - there are multiple treatment groups within the study

• Similar Groups - groups are composed of similar individuals

• Control

  - limiting unwanted variables within the study

• Randomization - subjects are randomly put into different groups

Which of the following statements is the NOT true?

A botanist is studying the effects of acidity on rate of growth. She grows one group of plants using water with neutral pH. She grows each other group using water with increasingly acidic pH levels.

• Control Group of Study: Plants growing in water with neutral pH.

• Dependent Variable of Study:

  pH level of "water"

• Independent Variable of Study:

  pH level of "water"

• Experimental Group of Study: Plants grown using water with increasingly acidic pH level.