I think the answer might be false, because you’re not interacting, i.e, you’re not talking or etc, with that person. I might be wrong, but still it could be the answer in a logical way :/
Answer:
Scientists have studied the benefits of hobbies. Having a pastime reduces stress.
OKAY, so you find a quote, and you make sure to mark the page/paragraph because it makes it easier to find. You then add your notations, which include your reactions to the quote, or maybe your thoughts on it when it comes to the context of the article.
Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”