Chapter 1 · Section 5 practice

Figures and Statistical Charts

0 of 4 answered

These questions review the examples in the companion slides. Choose an answer, then check the explanation.

Question 1

Which object owns the title and y-axis label of one subplot?

  • The DataFrame index
  • The Axes
  • The NumPy random generator
  • The CSV file

Question 2

In ax.hist(x, bins=50, density=True) the bars are scaled so that …

  • The tallest bar has height 1
  • The heights sum to 1
  • The total area of the bars is 1
  • The y-axis shows counts

Question 3

Which quantity represents probability in a density histogram?

  • The tallest bar
  • The sum of bar heights
  • Bar area over the interval
  • The number of bins

Question 4

How should missing x and y observations be removed?

  • Drop missing values separately and pair by position
  • Fill all missing returns with zero
  • Sort x and y independently
  • Align by key and remove incomplete pairs