Chapter 1 Discrete Random Variables

The science of collecting, presenting, analyzing, and interpreting data.

• Statistics

• Sample

• Probability

• Variable

A large collection, or set, of individuals or objects or events whose properties are to be analyzed.

• Sample

• Variable

• Statistic

• Population

A subset of the population.

• Statistice

• Sample

• Population

• Variable

A characteristic about each individual element of a population or sample that makes them different with each other.

• Variable

• Statistic

• Sample

• Population

Values, measurement, or category that describes an element of a population.

• Qualitative Variable

• Quantitative Variable

• Parameter

• Sample

A variable that is numerical in nature and quantifies an element of a population.

• Qualitative Variable

• Quantitative Variable

• Sample

• Parameter

A quantitative variable that can assume a countable number of values.

• Nominal Variable

• Ordinal Variable

• Discrete Variable

• Continuous Variable

A quantitative variable that can assume a measured number of values.

• Nominal Variable

• Ordinal Variable

• Discrete Variable

• Continuous Variable

Which of the following random variables is NOT continuous?

• Amount of gasoline in a car.

• Time it takes to commute to work.

• Number of goals scored by a hockey team.

• Speed of a car traveled from Ormoc to Kananga

Which one of the following is discrete data?

• Sam is 160 cm tall
• Sam weighs 60 lbs.
• Sam ran 100 meters in 10.2 seconds
• Sam has two brothers and one sister