The pressure of earths atmosphere at sea level is approximately 1000 millibars, and it decreases by a factor of 2 every 7 km as you go up in altitude.
a) if you live at an elevation of 1 km (3300 ft) what is the atmospheric pressure?
b) what is the atmospheric pressure at the top of a mountain that is 7722 meters?
c) by approximately what percentage does atmospheric pressure increase every km?

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?