1. A high school senior is collecting data on the colleges in which she is interested. Identify the variables as either categorical or quantitative.

1. Type of college: Private or Public college

1. Tuition: in thousands of dollars

1. State: the state in which the college is located

1. Zip Code: the zip code of the part of the country in which the college is located

1. Refer to the variables collected by the high school senior looking at colleges. Identify a question we might ask about any one of these individual variables.
2. Type of college:
3. Tuition:
4. State:

1. The ____________________ variable is used to understand or predict values of the

________________________ variable

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

1. 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. A student purchases a bag of Milk Chocolate M&M's from the vending machine.

1. 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.

1. In each situation, indicate whether the method of data collection is biased. If it is, briefly explain why.
2. Ask the students at the gym on a Tuesday afternoon how many hours a week they work out to estimate the average amount of time students at the university work out.

1. A campus bookstore is holding a drawing to give away five free textbooks (one per student). Students enter the contest by writing their name and contact information on an index card. The index cards were placed in a bowl, thoroughly mixed around, and five cards were selected. Those five students were contacted and received their free textbook.

1. Is using meditation to relax and clear the mind a natural way to treat insomnia? Design an experiment to investigate this question. Assume that you have 20 individuals who suffer from insomnia available to participate in the study. At the end of two months, you will ask subjects to rate their sleep quality.

1. Which statistic is more resistant to outliers (or extreme data values)?

A) Mean B)Median

1. Which statistic is more resistant to outliers (or extreme data values)?

A) Interquartile Range B) Standard Deviation