The following problems must be turned in:
- 50 people were studied to determine the number of hours they watch TV per week.
- Is this an experiment or an observational study? Why?
- Identify the variable of this study and determine if this is quantitative or qualitative.
- What is the level of measurement of this variable?
- A group of adults are randomly divided into two blocks: one block is told to drink tea every night for a week, and the other block is told not to drink tea at night. Researchers then ask all the participating adults to record what time they fall asleep.
- Is this study an experiment or an observational study?
- Is there a control group and a treatment group?
- Identify the variable of this study and determine if it is qualitative or quantitative.
- What is the level of measurement of the variable in this study?
- An observational study is used to determine the relationship between the number of TV’s in a household and the life expectancy of the members of those households. Identify some lurking variables and explain how these variables might effect both the number of TV’s in a household and the life expectancy of those in that household.
The following exercises should be done but do not need to be turned in:
Chapter review problems (page 33): #3, 4, 6, 7, 11.