Question

For each of the following study descriptions, identify whether the study is a survey, an observational study, or an experiment, and give a reason for your answer. For observational study and survey, identify the population of interest. For experiment, identify the treatment and response variables. A) Researchers are interested in comparing the effectiveness of two different eye drops in reducing intraocular pressure (IOP) in patients with glaucoma. They recruit 100 patients diagnosed with glaucoma and randomly assign them into two groups. One group receives Eye Drop A, while the other group receives Eye Drop B. After three months of daily usage, the researchers measure the IOP of each participant. B) Researchers aim to understand the prevalence of digital eye strain among university students. They distribute an online questionnaire to a random sample of 1000 university students, asking about their daily screen time, symptoms of eye strain, and any measures they take to alleviate it. C) Researchers are interested in investigating the relationship between outdoor sunlight exposure and the development of myopia in children. They select a cohort of 500 school-aged children and track their outdoor activities and myopia progression over a period of five years.

          For each of the following study descriptions, identify whether the study is a
survey, an observational study, or an experiment, and give a reason for your
answer. For observational study and survey, identify the population of interest. For
experiment, identify the treatment and response variables.
A) Researchers are interested in comparing the effectiveness of two different
eye drops in reducing intraocular pressure (IOP) in patients with glaucoma.
They recruit 100 patients diagnosed with glaucoma and randomly assign
them into two groups. One group receives Eye Drop A, while the other
group receives Eye Drop B. After three months of daily usage, the
researchers measure the IOP of each participant.
B) Researchers aim to understand the prevalence of digital eye strain among
university students. They distribute an online questionnaire to a random
sample of 1000 university students, asking about their daily screen time,
symptoms of eye strain, and any measures they take to alleviate it.
C) Researchers are interested in investigating the relationship between
outdoor sunlight exposure and the development of myopia in children.
They select a cohort of 500 school-aged children and track their outdoor
activities and myopia progression over a period of five years.

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