SAT, 26.09.2019 22:30 dillionmaggio
Aresearcher wanted to know if there is an association between exercise and sleep for the population of 16-year-olds in the united states. she obtained survey responses from a random sample of 2000 united states 16-year-olds and found convincing evidence of a positive association between exercise and sleep. which of the following conclusions is well supported by the data?
a. there is a positive association between exercise and sleep for 16-year-olds in the united states.
b. there is a positive association between exercise and sleep for 16-year-olds in the world.
c. using exercise and sleep as defined by the study, an increase in sleep is caused by an increase of exercise for 16-year-olds in the united states.
d. using exercise and sleep as defined by the study, an increase in sleep is caused by an increase of exercise for 16-year-olds in the world.
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