Cumulative histograms in Matplotlib - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a cumulative histogram?

A cumulative histogram shows the total count of data points up to each bin. It adds counts from previous bins to the current one, helping us see how data accumulates.

beginner

How do you create a cumulative histogram in matplotlib?

Use the parameter cumulative=True in the hist() function to make the histogram cumulative.

beginner

What does the bins parameter control in a histogram?

The bins parameter controls how many intervals the data is split into. More bins mean finer detail, fewer bins mean more general view.

intermediate

Why use a cumulative histogram instead of a regular histogram?

A cumulative histogram helps understand the proportion or count of data below a certain value, showing how data builds up across bins.

intermediate

What does the density=True option do in a histogram?

It normalizes the histogram so the area sums to 1, showing probabilities instead of counts. This works with cumulative histograms to show cumulative probabilities.

Which parameter makes a histogram cumulative in matplotlib?

A cumulative=True

B density=True

C bins=10

D stacked=True

Setting cumulative=True in hist() makes the histogram cumulative.

What does a cumulative histogram show?

A Maximum value per bin

B Only counts in each bin

C Counts added up to each bin

D Average value per bin

A cumulative histogram shows the total counts up to each bin, adding previous bins' counts.

If you want to see the probability distribution in a cumulative histogram, which parameter should you use?

A bins=5

B density=True

C cumulative=False

D stacked=True

Using density=True normalizes counts to probabilities, useful in cumulative histograms.

What happens if you increase the number of bins in a histogram?

A You get more detailed intervals

B You get fewer intervals

C Histogram becomes cumulative

D Histogram shows averages

More bins split data into smaller intervals, showing more detail.

Which matplotlib function is used to create histograms?

A plt.scatter()

B plt.plot()

C plt.bar()

D plt.hist()

The plt.hist() function creates histograms in matplotlib.

Explain how to create and interpret a cumulative histogram using matplotlib.

Think about how counts add up across bins and how matplotlib parameters control this.

Describe the difference between a regular histogram and a cumulative histogram.

Focus on what each histogram tells you about the data.