STAT231 Study Guide - Midterm Guide: Random Variable, Standard Deviation, Quartile
Document Summary
Answer for mc questions: (2 marks for each correct answer: b, b, d, e, c, b. Problem: an auto manufacturer want to know the average distance cars registered in. Plan: a gasoline company with service outlets across ontario is asked to collect data on the distance driven since the last oil change for all cars licensed in ontario whose oil they change during the last week in february. Drivers who always change their own oil are not in the study population, but are in the target population. It is easy to imagine that they could change their oil more (or less) often than drivers who pay a service outlet to do it. This would result in study error. (2 marks) Following is a histogram of the times until failure for a sample of 300 electronic components. 4% 1% 0. 8% 0. 4% 0. 8: which statistic which would be the most appropriate measure of spread for these data.
