STAT 201 EXAM 1 VERIFIED ACCURATE STUDY
GUIDE
summary or descriptive statistics - Answers - statistics to make the leap from historical
data to story telling; use of DS and charts to summarize the data to identity trends
Inferential Statistics - Answers - use of descriptive statistics of a sample to make
estimates bout the population.
Subject - Answers - the person or thing we are studying or measuring
Variable - Answers - characteristic observed of the subject
Examples of subject - Answers - People, STAT 201 students
Example of Population - Answers - US population, all students in STAT classes at USC,
the group we look at
Examples of Variable - Answers - Height, gender
Sample - Answers - the set of subjects that we have data for
Population - Answers - the set of all subjects of interest
Statistic - Answers - numerical summary of a sample; US alphabet to represent
Statistic examples - Answers - Mean(𝑥 ), proportion(𝑝),median, mode, standard
deviation(𝑠), variance(𝑠2),Q1, Q3, IQR, etc.
Parameter - Answers - numerical summary of a population; greek alphabet used to
represent; dont know these values
Parameter Examples - Answers - Mean(𝜇𝑥), proportion(𝜌), median, mode, standard
deviation(𝜎),variance(𝜎2), Q1, Q3, IQR, etc
Census - Answers - collect data for every individual in the population
Census Example - Answers - Example: Country Census Data, World Bank Data
Judgement - Answers - collect a sample that an expert thinks is representative
Judgement Examples - Answers - Example: Surveying land for contamination (Lab 1)
GUIDE
summary or descriptive statistics - Answers - statistics to make the leap from historical
data to story telling; use of DS and charts to summarize the data to identity trends
Inferential Statistics - Answers - use of descriptive statistics of a sample to make
estimates bout the population.
Subject - Answers - the person or thing we are studying or measuring
Variable - Answers - characteristic observed of the subject
Examples of subject - Answers - People, STAT 201 students
Example of Population - Answers - US population, all students in STAT classes at USC,
the group we look at
Examples of Variable - Answers - Height, gender
Sample - Answers - the set of subjects that we have data for
Population - Answers - the set of all subjects of interest
Statistic - Answers - numerical summary of a sample; US alphabet to represent
Statistic examples - Answers - Mean(𝑥 ), proportion(𝑝),median, mode, standard
deviation(𝑠), variance(𝑠2),Q1, Q3, IQR, etc.
Parameter - Answers - numerical summary of a population; greek alphabet used to
represent; dont know these values
Parameter Examples - Answers - Mean(𝜇𝑥), proportion(𝜌), median, mode, standard
deviation(𝜎),variance(𝜎2), Q1, Q3, IQR, etc
Census - Answers - collect data for every individual in the population
Census Example - Answers - Example: Country Census Data, World Bank Data
Judgement - Answers - collect a sample that an expert thinks is representative
Judgement Examples - Answers - Example: Surveying land for contamination (Lab 1)
