Who can help me with my question please I really need help

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

What function has a range {yly< 5}? question on picture above^

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?