Outside temperatures over the course of a day can be modeled as a sinusoidal function. Suppose the temperature varies between 46°F and 62°F during the day and the average daily temperature first occurs at 10 a. m. How many hours after midnight does the temperature first reach 50°F?

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?