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”
Answer:
- es una catarata es he table is ángeles at 50
Explanation:
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1) Do you know what Subtle means? You need to know what words mean before you write it down. Subtle - especially of a change or distinction. Here is an example - It was a subtle of gray.
Other than that the text you wrote is amazing! Good Job! I guarantee you will get an A+! Plus you so deserve an A+!!!
