BSTAT Final Exam Review Homework
questions well answered to pass
Factor analysis is an unsupervised learning technique because there is no specific response
variable involved, which is a requirement for a supervised learning technique. - correct answer
✔✔Which of the following is not a supervised learning technique in predictive analytics?
linear regression
factor analysis
decision trees
neural networks
traditional statistics. - correct answer ✔✔________ consists of a set of concepts and techniques
that are used to describe populations and samples and to make statistical inferences about
populations by using samples.
whether a person has a traffic violation - correct answer ✔✔Which of the following is a
categorical variable?
Multiple Choice
air temperature
bank account balance
daily sales in a store
whether a person has a traffic violation
value of company stock
, Statistical inference
By definition,
a time series is a study of data over time;
descriptive statistics is the study of the measurements of population variables;
a random sample is a data set. - correct answer ✔✔________ is the science of using a sample
to make generalizations about the important aspects of a population.
Time series analysis
Descriptive statistics
Random sample
Statistical inference
sample - correct answer ✔✔A ________ is a subset of the units in a population.
qualitative - correct answer ✔✔A(n) ________ variable can have values that indicate into which
of several categories of a population it belongs.
time series
A time series is a collection of data taken over time, while a cross-section is a collection of data
taken at the same point in time. - correct answer ✔✔If we collect data on the number of wins
the Dallas Cowboys earned each of the past 10 years, we have ________ data.
histogram - correct answer ✔✔Which of the following divides quantitative measurements into
classes and graphs the frequency, relative frequency, or percentage frequency for each class?
questions well answered to pass
Factor analysis is an unsupervised learning technique because there is no specific response
variable involved, which is a requirement for a supervised learning technique. - correct answer
✔✔Which of the following is not a supervised learning technique in predictive analytics?
linear regression
factor analysis
decision trees
neural networks
traditional statistics. - correct answer ✔✔________ consists of a set of concepts and techniques
that are used to describe populations and samples and to make statistical inferences about
populations by using samples.
whether a person has a traffic violation - correct answer ✔✔Which of the following is a
categorical variable?
Multiple Choice
air temperature
bank account balance
daily sales in a store
whether a person has a traffic violation
value of company stock
, Statistical inference
By definition,
a time series is a study of data over time;
descriptive statistics is the study of the measurements of population variables;
a random sample is a data set. - correct answer ✔✔________ is the science of using a sample
to make generalizations about the important aspects of a population.
Time series analysis
Descriptive statistics
Random sample
Statistical inference
sample - correct answer ✔✔A ________ is a subset of the units in a population.
qualitative - correct answer ✔✔A(n) ________ variable can have values that indicate into which
of several categories of a population it belongs.
time series
A time series is a collection of data taken over time, while a cross-section is a collection of data
taken at the same point in time. - correct answer ✔✔If we collect data on the number of wins
the Dallas Cowboys earned each of the past 10 years, we have ________ data.
histogram - correct answer ✔✔Which of the following divides quantitative measurements into
classes and graphs the frequency, relative frequency, or percentage frequency for each class?
