Sia
Question
Math
Posted 10 months ago
Angela created and maintains an exercise app where users log their workouts. She wonders if sending users a daily notification that reminds them to use the app will result in them logging more workouts. She releases an update to her app so that half of users will have daily notifications and the other half won't have daily notifications (randomly determined for each user). After a few weeks, she'll see if one group logs more workouts on average than the other group.
What type of study is this, and what is the response variable?
Choose 1 answer:
(A) An observational study where the number of workouts is the response variable
(B) An observational study where notification presence is the response variable
(c) An experiment where the number of workouts is the response variable
(D) An experiment where notification presence is the response variable
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Answer from Sia
Posted 10 months ago
Solution by Steps
step 1
Identify the characteristics of the study based on the description provided
step 2
Determine if the study is observational or an experiment. An observational study observes subjects without assigning any interventions, while an experiment involves assigning interventions to the subjects
step 3
In the description, Angela assigns an intervention by updating the app to send daily notifications to half of the users. This indicates that the study is an experiment
step 4
Identify the response variable, which is the outcome the study aims to measure
step 5
The response variable in this study is the number of workouts logged, as Angela is measuring if there is a difference in this variable between the two groups
[question number] Answer
(C) An experiment where the number of workouts is the response variable
Key Concept
Experiment vs. Observational Study
Explanation
An experiment involves actively assigning treatments or interventions to subjects and observing the outcomes, while an observational study does not involve any intervention. In this case, Angela's study is an experiment because she is manipulating the conditions by providing notifications to one group of users. The response variable is the number of workouts logged, which is the outcome she is interested in measuring.
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