Question

(CO 1) What type of data collection might be best to estimate the impact of exercise on longevity?

Observational

Survey

Experiment

Simulation

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Question 72 pts

(CO 1) What type of data collection might be best to study how voters might decide an upcoming ballot issue?

Observational

Experiment

Survey

Simulation

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Question 82 pts

(CO 1) You need to study the satisfaction of customers of a specific restaurant. You ask every 10^th customer as they leave after their meal. This would most closely describe which type of sampling technique?

Convenience

Systematic

Random

Stratified

Answer 1

1) What type of data collection might be best to estimate the impact of exercise on longevity

Ans : Experiment

What type of data collection might be best to study how voters might decide an upcoming ballot issue?

Ans : Survey

• In an observational study, a researcher measures and observes the variables of interest without changing existing conditions.
• In an experiment, a researcher assigns a treatment and observes the response. Sometimes, a control group (a group receiving no treatment or a placebo) may be used to compare the effectiveness of a treatment.
• A simulation uses a mathematical, physical, or computer model to replicate the conditions of a process or situation. This is frequently used when the actual situation is too expensive, dangerous, or impractical to replicate in real life.
• A survey is used to investigate characteristics of a population. It is frequently used when the subjects are people, and questions are asked of them

You need to study the satisfaction of customers of a specific restaurant. You ask every 10^thcustomer as they leave after their meal. This would most closely describe which type of sampling technique

Ans : Systematic

In systematic random sampling, the researcher first randomly picks the first item or subject from the population. Then, the researcher will select each n^th subject from the list