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bookPreliminary Analysis

Checking for null values and duplicates is important in the data cleaning and preparation process because this helps to ensure the quality and accuracy of the data.

  • Null values can indicate missing or incomplete data and, if not handled properly, can lead to inaccuracies in any analysis or modeling performed on the data. For example, if a null value is present in a column that is used as a predictor variable in a machine learning model, the model will not be able to predict that data point.

  • Duplicates can also lead to inaccuracies in analysis, especially if they are not identified and removed. For example, if a data point is duplicated, it will be counted twice in any analysis performed, potentially skewing the results. Additionally, duplicate data can increase the size of the dataset and slow down any analysis or modeling performed on it.

Task

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  1. Check for any NaN (Not a Number) values in the DataFrame df.
  2. Drop the duplicates, as they are not useful for our analysis.

Solution

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SectionΒ 1. ChapterΒ 4

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bookPreliminary Analysis

Checking for null values and duplicates is important in the data cleaning and preparation process because this helps to ensure the quality and accuracy of the data.

  • Null values can indicate missing or incomplete data and, if not handled properly, can lead to inaccuracies in any analysis or modeling performed on the data. For example, if a null value is present in a column that is used as a predictor variable in a machine learning model, the model will not be able to predict that data point.

  • Duplicates can also lead to inaccuracies in analysis, especially if they are not identified and removed. For example, if a data point is duplicated, it will be counted twice in any analysis performed, potentially skewing the results. Additionally, duplicate data can increase the size of the dataset and slow down any analysis or modeling performed on it.

Task

Swipe to start coding

  1. Check for any NaN (Not a Number) values in the DataFrame df.
  2. Drop the duplicates, as they are not useful for our analysis.

Solution

Mark tasks as Completed
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 4
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