Introduction to Statistics
1. Credit card usage is requiring an increasing amount of information from users in order to avoid credit card theft. For example, many gas stations require zip codes to be entered in addition to the credit card itself. Classify each of the following as qualitative or quantitative variables. (a)
2. A poll is to be conducted from the TV viewing public who watched last year s Super Bowl. Individuals are asked whether the Super Bowl commercials met their standards of decency. Eight hundred Super Bowl viewers will be selected randomly and asked their opinion. (a)
What is the population?
What is the variable of interest?
Is the variable of interest qualitative or quantitative?
What is the sample?
3. Manufacturing all over the world is faced with what to do with hazardous waste materials. The following is a list of variables that might be collected from an area near a manufacturing facility. Classify each variable as either qualitative or quantitative. (a)
Amount of toxins in frogs captured in a nearby lake
Air quality measured in the concentration of CO2
Price of homes in communities near the manufacturing facility Color of foliage near the manufacturing facility
4. A recent commercial stated that 7 out of 10 doctors recommend brand X pain relief over all other over the counter pain relief medicines. Does this conclusion come from looking at a population or at a sample?
5. Classify the following data as quantitative or qualitative for the students in a statistics class: (a)
Ethnic classification of the student
Weight of the student
Number of textbooks used by the student during the current term Number of hours of physical exercise the student gets per week Telephone number of the student
Student ID (or social security number)
6. Classify each of the following quantitative...
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