The Practice of Statistics

What is the branch of mathematics dealing with the collection, organization, analysis, interpretation and presentation of data?

• Algebra

• Geometry

• Probability

• Statistics

What is a quantitative variable that could have an infinite number of values?

• categorical variable

• qualitative variable

• discrete variable

• continuous variable

What are characteristics that are defined by a number, such as age or weight?

• descriptive statistics

• inferential statistics

• categorical variables

• numerical variables

What is the term in statistics for the entire collection or group of individuals being studied?

• population

• sample

• parameter

• statistic

What is a characteristic of a sample?

• parameter

• statistic

• categorical variable

• numerical variable

What is the branch of statistics that involves organizing, displaying and describing data?

• descriptive statistics

• inferential statistics

• sports statistics

• health statistics

What is the word in statistics for any characteristic or attribute of a person, place, or thing?

• variable

• descriptive statistic

• inferential statistic

• parameter

This is what type of sample?

• cluster

• convenience

• systematic

• stratified

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.
This is what type of sample?

• convenience

• stratified

• simple random sample

• cluster

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

• Cluster Sampling

• Systematic Sampling

• Stratified Sampling

• Simple Random Sampling