Data Gathering Techniques

What type of study is described? A gym asks its customers if they would prefer the gym to open earlier in the morning.

• Experiment

• Observational Study

• Sample Survey

What type of study is described? A gym tries out a new weightlifting method to see if it will build muscle for their customers faster than their current method.

• Sample Survey

• Experiment

• Observational Study

What type of study is described? A gym counts the customers that come in before 8AM.

• Observational Study

• Sample Survey

• Experiment

A soft drink company calls 500 people at random and asks, "Is our product or our rival's product the best soft drink on the market?" Is this question biased? How?

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The population is grouped according to age and a random sample is chosen from each group. What sampling method is used?

• Stratified

• Cluster

• Systematic

• Simple Random

• Convenience

A number of hospitals around the country were randomly chosen. Within each hospital, all the nurses were selected. What sampling method is used?

• Stratified

• Cluster

• Systematic

• Simple Random

• Convenience

You are designing an experiment to determine if coffee improves memory. You have a group that drinks coffee and a group that does not drink coffee. Which group would be the control group?

An ice cream shop is trying to determine what new flavors they should sell to their customers. What type of study do you suggest they use?

• Sample Survey

• Experiment

• Observational Study

A researcher wants to determine if plant growth is affected by temperature. What type of study would you suggest the researcher uses? Why?

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