The movie in the revengers series have been coming out evert three years . the sum of the years in which the first six movies came out it 12,057 . in what year is the 7th movie expected to come out ? the answer is 2020, i need an explanation on how to get there

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?