Question

1. A nutritionist wants to study the effect of diet soda on obesity. a. If the nutritionist decides to conduct an observational study to analyze the effect, describe what that study might look like. b. If the nutritionist decides to conduct an experiment to analyze the effect, describe what that study might look like. Indicate what about this design distinguishes it as an experiment from your observational study in part a. 2. A researcher is investigating the effects of online learning on K-12 education. He plans to conduct a survey that will be emailed to all parents and teachers of students by the school administrators. He decides to randomly select four schools in the district with approximately 400 students. The parents and teachers of all the students at these schools will be surveyed. Describe the sampling method being used and possible sources of sampling bias in his design.

          1. A nutritionist wants to study the effect of diet soda on obesity.
a. If the nutritionist decides to conduct an observational study to analyze the effect,
describe what that study might look like.
b. If the nutritionist decides to conduct an experiment to analyze the effect, describe
what that study might look like. Indicate what about this design distinguishes it as an
experiment from your observational study in part a.
2. A researcher is investigating the effects of online learning on K-12 education. He plans to
conduct a survey that will be emailed to all parents and teachers of students by the school
administrators. He decides to randomly select four schools in the district with approximately
400 students. The parents and teachers of all the students at these schools will be surveyed.
Describe the sampling method being used and possible sources of sampling bias in his design.

1. A nutritionist wants to study the effect of diet soda on obesity.
a. If the nutritionist decides to conduct an observational study to analyze the effect,
describe what that study might look like.
b. If the nutritionist decides to conduct an experiment to analyze the effect, describe
what that study might look like. Indicate what about this design distinguishes it as an
experiment from your observational study in part a.
2. A researcher is investigating the effects of online learning on K-12 education. He plans to
conduct a survey that will be emailed to all parents and teachers of students by the school
administrators. He decides to randomly select four schools in the district with approximately
400 students. The parents and teachers of all the students at these schools will be surveyed.
Describe the sampling method being used and possible sources of sampling bias in his design.

Added by John J.

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