Load the combined CSV to memory and perform a simple EDA

[cmmclaug]

5. Load the combined CSV to memory and perform a simple EDA rubric={correctness:10,reasoning:10}

• [x] Investigate at least two of the following approaches to reduce memory usage while performing the EDA (e.g., value_counts).
• Changing dtype of your data
• Load just columns what we want
• Loading in chunks
• Dask
• [x] Discuss your observations.

[KangboLu]

Reference to the lecture: https://github.ubc.ca/MDS-2020-21/DSCI_525_web-cloud-comp_students/blob/master/Lectures/Lecture_1_2.ipynb