Probability and Statistics Formative Assessment 1.3

Determine whether the following is an observational study or an experiment. In a survey of 100 Saint Cloud High School students 31% said they enjoy the food in the cafeteria.

• Observational Study

• Experiment

Determine whether the study is an observational study or an experiment. 24 people are randomly assigned either a real treatment or a placebo to see if a new drug helps reduce the pain in cancer patients.

• Observational Study

• Experiment

Determine whether the following is an observational study or an experiment. Different species of plants were examined to see how they hold up in hot weather. Three different species of plants were all placed in the same room and they amount they grew was recorded each day.

• Observational Study

• Experiment

Determine whether the following is an observational study or an experiment. A group of dogs are randomly assigned one of two different types of hip joint medication and their health is recorded every week.

• Observational Study

• Experiment

Identify the sampling technique used. A student asks their friends at lunch what their favorite school subject is.

• SRS

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling technique used. Every 5th person who enters Publix is asked what they would like to see changed about the store.

• SRS

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling technique used. Five classrooms are randomly selected and every student in the room is asked if they are happy with the high school

• SRS

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling technique used. Fifty males and fifty females are asked who their favorite super hero is.

• SRS

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling technique used. Every orange tree in a field is number, then twenty-five trees are selected and measured.

• SRS

• Stratified

• Cluster

• Systematic

• Convenience

Identify the sampling technique used. Ten cats from each different breed of cats are selected and then their weight is recorded.

• SRS

• Stratified

• Cluster

• Systematic

• Convenience