Provide relatively short but concise answers

1-4State whether the data are best described as a population or a sample.

1. A student purchases a bag of Milk Chocolate M&M's from the vending machine. The makers of M&M's state that when they package their candies they thoroughly mix the colored candies together and randomly put them into packages_____________________________________________

2. A professor wants to schedule a review session for an exam. He asks all students enrolled in the course their preferred time, and they all respond._____________________________________________

3. A researcher has identified a beach with a substantial number of driftwood logs. She randomly chooses 30 logs and takes core samples from those logs._____________________________________________

4. A football fan recorded the number of rushing yards for all NFL running backs who played last season._____________________________________________

5. In elementary school (Grades 1 through6) there is a strong association between a child's height and reading ability. What is a possible confounding variable that would help explain this relationship? Explain briefly.___________________________________________