FOUNDATIONS OF STATISTICS FOR DATA
SCIENTISTS WITH R AND PYTHON 1ST
EDITION ALAN AGRESTI MARIA KATERI
SOLUTIONS MANUAL FINAL STUDY GUIDE
2026 SOLVED QUESTIONS FULLY CORRECT
⫸ What are categorical variables? Answer: Variables that represent
categories or groups, such as zip code and sex.
⫸ What are ordinal variables? Answer: Variables that tell us whether a
data point is more or less than another data point, but do not indicate the
magnitude of the difference.
⫸ What is a frequency table? Answer: A table that groups data based on
how often each data point occurs.
⫸ What is a histogram? Answer: A graph of a frequency chart using
continuous data.
⫸ What does variance measure? Answer: The amount of spread in a
distribution.
⫸ How do you calculate the mean in R? Answer: Using the command
mean(c(1,4,6,7,9)).
SCIENTISTS WITH R AND PYTHON 1ST
EDITION ALAN AGRESTI MARIA KATERI
SOLUTIONS MANUAL FINAL STUDY GUIDE
2026 SOLVED QUESTIONS FULLY CORRECT
⫸ What are categorical variables? Answer: Variables that represent
categories or groups, such as zip code and sex.
⫸ What are ordinal variables? Answer: Variables that tell us whether a
data point is more or less than another data point, but do not indicate the
magnitude of the difference.
⫸ What is a frequency table? Answer: A table that groups data based on
how often each data point occurs.
⫸ What is a histogram? Answer: A graph of a frequency chart using
continuous data.
⫸ What does variance measure? Answer: The amount of spread in a
distribution.
⫸ How do you calculate the mean in R? Answer: Using the command
mean(c(1,4,6,7,9)).
