00:01
All right, so here we are given this example of a study that was done.
00:08
So it says in a study of three nationally representative large -scale data sets from ireland, the united states, and the united kingdom, teenagers between the ages of 12 to 15 were asked to keep a diary of their screen time and then answer questions about how they felt or active.
00:25
And so the answers to these questions were used to create a second.
00:30
Psychological well -being score.
00:33
And so they also collected additional metadata that included age, gender, mothers ' education, ethnicity, physiological distress, or psychological distress, and employment.
00:48
And so the study concludes that there is little clear -cut evidence that screen time decreases adolescent well -being.
00:57
And so we want to know, can the results of this study be generalized to the population of irish, u .s.
01:05
And uk teenagers? why or why not? and can the results of the study be used to determine if screen time affects adolescent well -being? why or whatnot? and so first off, i want to point out that the sample size that they used for this, so this was a real study.
01:23
And the sample study, or sorry, sample size that they used was, quite large, it was a total of 17 ,247 teenagers participated in this study.
01:36
And so that is a really big number, especially when you're working with human subjects.
01:42
And so i think that was, i think that's great.
01:45
And so just overall looking at this study, the just the design that we have a cross -sectional observational study going on.
01:56
And this basically means, that the researchers took other data...