Wrong answer?

[halgrenon]

I’m working on AWS Certified Machine Learning Engineer Associate Practice Exams MLA-C01 2025 course Timed Mode Set 1 – AWS Certified Machine Learning Engineer Associate questions and think there is a wrong answer, I double checked with perplexity and it to thinks the answer is wrong.

The question is:

A data analyst needs to choose the most appropriate visualization methods for various data analysis tasks related to customer purchase patterns.

Match each visualization method with its primary use case in analyzing customer purchase records. Each service should be selected one or more times. (Select THREE.)

• Bar Chart
• Histogram
• Density plot
• Heatmap

1. Examining the frequency of purchases for different items over a specific time period.Bar chart (Histogram) Choices: Bar chart, Histogram, Density plot, Heatmap
2. Understanding the concentration and distribution of transaction values in a continuous range.Histogram (Density plot) Choices: Bar chart, Histogram, Density plot, Heatmap
3. Identifying patterns in purchasing behavior across various time intervals and item categories.Heatmap (Bar chart) Choices: Bar chart, Histogram, Density plot, Heatmap

My answers are after the question and the “right” ones are in the parentheses.
If the provided answer is correct could you give me some more context?

For example the plot of point 1 would have an x axis of items and y axis of frequencies, which is more suitable for bar chart than histogram.
Similarly for point 2 x axis is transaction values and y is their frequency which is a histogram.
For point 3 axis x is time and y are item categories which is a heatmap

• This discussion was modified 4 months, 2 weeks ago by  halgrenon.

[Nikee-TutorialsDojo]

Hi halgrenon,

Thank you for bringing this to our attention, and sincere apologies for the confusion this may have caused during your practice session.

You’re absolutely right to question the visualizations based on the axes and purpose you described. Your reasoning around the proper application of bar charts, histograms, and heatmaps is spot on.

We appreciate your detailed feedback and the effort you took to validate it. We’ll review and update the item accordingly to ensure it reflects the correct use cases and maintains alignment with the exam’s intent.

Thanks again, and please continue to share any observations.

Best Regards,

Nikee @ Tutorials Dojo