Julia went to the movies and bought one jumbo popcorn and two chocolate chip cookies for $5.00. marvin went to the same movie and bought one jumbo popcorn and four chocolate chip cookies for $6.00. how much does one chocolate chip cookie cost?

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?