INTRODUCTION TO PROBABILITY AND STATISTICS CERTIFICATION EVALUATION EXAMS SET FULL QUESTIONS AND COMPLETE SOLUTION

INTRODUCTION TO PROBABILITY AND
STATISTICS CERTIFICATION EVALUATION
EXAMS SET FULL QUESTIONS AND
COMPLETE SOLUTION

●● In the context of data, what is an individual?
Answer: a particular person or object


●● What is a data?
Answer: The values (measurements or observations) that the variable
can assume.


●● What is a dataset?
Answer: A set of data identified with particular circumstances.


●● Variables that take category or label values, and place an individual
into one of several groups, are what?
Answer: Categorical


●● Variables that take numerical values, and represent some kind of
measurement, are what?
Answer: Quantitative

, ●● Choosing individuals from a population is called what?
Answer: Sampling


●● Standing outside of a busy place and asking people questions is an
example of which type of sample?
Answer: Convenience Sample


●● Sending a poll to every 50th person on a list is an example of which
type of sample?
Answer: Systematic Sampling


●● Sending a poll to completely random people from a list is an
example of which type of sample?
Answer: Simple Random Sample (SRS)


●● In order to get a random sample of high-school seniors from a certain
city, we choose a random sample of 25 seniors from each of the high
schools in that city. A sample that consists of all these samples put
together is what type of sampling?
Answer: Stratified Sampling


●● In order to get a sample of high school seniors from a certain city, we
choose three high schools at random from among all high schools in that