Mathematics, 19.10.2019 01:10 Geo777
Screens, teens, and psychological well-being. in a study of three nationally representative large- scale data sets from ireland, the united states, and the united kingdom (n = 17,247), teenagers between the ages of 12 to 15 were asked to keep a diary of their screen time and answer questions about how they felt or acted. the answers to these questions were then used to compute a psychological well-being score. additional data were collected and included in the analysis, such as each child’s sex and age, and on the mother’s education, ethnicity, psychological distress, and employment. the study concluded that there is little clear-cut evidence that screen time decreases adolescent well-being.35
(a) what type of study is this?
(b) identify the explanatory variables.
(c) identify the response variable.
(d) comment on whether the results of the study can be generalized to the population, and why.
(e) comment on whether the results of the study can be used to establish causal relationships.
Answers: 1
Mathematics, 21.06.2019 20:30
Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.
Answers: 3
Mathematics, 21.06.2019 21:00
Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.
Answers: 1
Screens, teens, and psychological well-being. in a study of three nationally representative large- s...
Mathematics, 18.05.2021 18:20
Chemistry, 18.05.2021 18:20
Mathematics, 18.05.2021 18:20
Mathematics, 18.05.2021 18:20
Mathematics, 18.05.2021 18:20
SAT, 18.05.2021 18:20
English, 18.05.2021 18:20
Computers and Technology, 18.05.2021 18:20
Mathematics, 18.05.2021 18:20