Question

jerry was reading about a study that looked at the connection between smartphone usage and happiness based on data from approximately 5{,}0005,0005, comma, 000 randomly selected teenagers. The study found that, on average, the teens who spent more time on smartphones were significantly less happy than those who spent less time on smartphones. Jerry concluded that spending more time on smartphones makes teens less happy. Why is Jerry's conclusion not appropriate

Answer 1

C) The study was observational, so he shouldn't make a casual conclusion.

Step-by-step explanation:

The observational study refers to a study in which the investigator notices the population that is already existed and collect the information from it

While on the other hand, in the case of the experimental study there is no role of pre-existing population. In this, the investigator choose an individual group on a random basis also there has control in this study

Therefore in the given case, the option C is to be selected as it is an observational study

The option B is not chosen as the sample size is not big.