MATH 225N WEEK 6 DISCUSSION
CONFIDENCE INTERVAL FINAL STUDY SHEET
2026 QUESTIONS WITH COMPLETE ANSWERS
GRADED A+
◉ refers to generalizing from a sample to a population, drawing
conclusions, and making decisions refers to. Answer: Inferential
Statistics
◉ refers to summarizing data rather than generalizing about the
population is. Answer: Descriptive Statistics
◉ True or False: A strong correlation between A and B would imply
that B is caused by A. Answer: False
◉ True or False: The number of checks processed at a bank in a day
is an example of categorical data. Answer: False
◉ True or False: The number of planes that land daily at an airport is
an example of discrete data. Answer: True
◉ True or False: The weight of a bag of dog food is an example of
discrete data. Answer: False
,◉ True or False: It is easier to attempt a census of a large population
instead of relying on a sample. Answer: False
◉ True or False: Sampling error is completely avoidable by choosing
the sample scientifically. Answer: False
◉ True or False: Cluster sampling is a type of stratified sampling
that is based on geographical location. Answer: True
◉ Which of the following is numerical data?. Answer: The fuel
economy (MPG) of your car
◉ Numerical values calculated from a sample are called. Answer:
statistics
◉ True or False: The number of personal fouls by the Miami Heat in
a game would be regarded as a continuous variable. Answer: False
◉ Thirty work orders are selected from a filing cabinet containing
500 work order folders by choosing every 15th folder. Which
sampling method is this?. Answer: Systematic sampling
, ◉ Which sampling method is being used by a journalism student
who is casually surveying opinions of her friends about the
university's cafeteria food for an article that she is writing?. Answer:
Non-random sampling
◉ Net earnings reported by Xena Corp for the last 10 quarters is
which type of variable?. Answer: A time-series variable
◉ A multivariate data set must contain. Answer: more than two
variables
◉ True or False: The following is an example of cross-sectional data:
Scores of 50 students on a midterm accounting exam last semester..
Answer: True
◉ True or False: The following is an example of cross-sectional data:
Bob's scores on weekly accounting quizzes last semester.. Answer:
False
◉ True or False: The following is an example of time-series data:
Mexico's GDP for the last 10 quarters.. Answer: True
◉ Which type of data is the following variable: number of employees
in the Walmart store in Boone, NC?. Answer: Ratio
CONFIDENCE INTERVAL FINAL STUDY SHEET
2026 QUESTIONS WITH COMPLETE ANSWERS
GRADED A+
◉ refers to generalizing from a sample to a population, drawing
conclusions, and making decisions refers to. Answer: Inferential
Statistics
◉ refers to summarizing data rather than generalizing about the
population is. Answer: Descriptive Statistics
◉ True or False: A strong correlation between A and B would imply
that B is caused by A. Answer: False
◉ True or False: The number of checks processed at a bank in a day
is an example of categorical data. Answer: False
◉ True or False: The number of planes that land daily at an airport is
an example of discrete data. Answer: True
◉ True or False: The weight of a bag of dog food is an example of
discrete data. Answer: False
,◉ True or False: It is easier to attempt a census of a large population
instead of relying on a sample. Answer: False
◉ True or False: Sampling error is completely avoidable by choosing
the sample scientifically. Answer: False
◉ True or False: Cluster sampling is a type of stratified sampling
that is based on geographical location. Answer: True
◉ Which of the following is numerical data?. Answer: The fuel
economy (MPG) of your car
◉ Numerical values calculated from a sample are called. Answer:
statistics
◉ True or False: The number of personal fouls by the Miami Heat in
a game would be regarded as a continuous variable. Answer: False
◉ Thirty work orders are selected from a filing cabinet containing
500 work order folders by choosing every 15th folder. Which
sampling method is this?. Answer: Systematic sampling
, ◉ Which sampling method is being used by a journalism student
who is casually surveying opinions of her friends about the
university's cafeteria food for an article that she is writing?. Answer:
Non-random sampling
◉ Net earnings reported by Xena Corp for the last 10 quarters is
which type of variable?. Answer: A time-series variable
◉ A multivariate data set must contain. Answer: more than two
variables
◉ True or False: The following is an example of cross-sectional data:
Scores of 50 students on a midterm accounting exam last semester..
Answer: True
◉ True or False: The following is an example of cross-sectional data:
Bob's scores on weekly accounting quizzes last semester.. Answer:
False
◉ True or False: The following is an example of time-series data:
Mexico's GDP for the last 10 quarters.. Answer: True
◉ Which type of data is the following variable: number of employees
in the Walmart store in Boone, NC?. Answer: Ratio
