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Cam X ent/Assignment-Response a It) o (--) c | secure l https//u ? ? |? Secure! https://wwww.webassign.ne were randomly assigned to one of two groups: the new the same type of fuel without the new additive. The vehicles were run in a laboratory setting and the emissions levels for each vehicle were recorded. 0:00 6. Watch the video below on be able to complete Q11 & O This is an experiment because vehicles were randomized to the treatment O This is an experiment because vehicles were not randomized to the treatment groups 2 This is an observational analysis because experimental control was in place while emissions were recorded. D This is an observational analysis because experimental control was not in place while the emissions were recorded. This is an experiment because experimental control was in place while the emssions were recorded. O This is an observational study because vehicles were replicated within each treatment condition. G This is an experimental because vehicles were replicated within each treatment condition. . Imagine stud on their hea . Onc appma those who l levels Using these data, the levels. company may be able to prove a causal link betvieen use of the additive and emissions . The Natio make this . "Duri If the company analysts observe a high R? for the model predicting emissions level based on treatment group then the company can conclude that there exists a causal link betvween emissions level and the use of the ne additive. . "Wou observe a new additive. variables here that may constitute systematic differances between the treatment 7. Complete Homewor

Explanation / Answer

The option chosen in question a and b is correct.

Obviously it is an observational study.

Also a high value of R square stands for, their exists a causal link between emmisions level and use of new additive .

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