Aresearcher wants to determine if people who watch 2 or more hours of television a day are happier than those
who don't watch television. the researcher randomly picks 20 people. half were asked to watch television for at
least 2 hours a day for 2 weeks and the other half were asked not to watch television for 2 weeks.
what type of research is this?
an observational study
a census
a survey
an experiment

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?