Asurvey reported that 70% of those responding to a national survey of college freshmen were interested in taking summer courses. using the sample size of 49, calculate a 95% confidence interval for the proportion of college students who are interested in taking summer courses.

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?