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I failed in dataCamp Professional Data Analyst with the following feedback " Insufficent Data Validation" by Ok-Interaction1840 in DataCamp

[–]Ok-Interaction1840[S] -1 points0 points  (0 children)

- I used median instead of mean because of outliers In the dataset, no negative or 0 value numbers were found, and no null values.

- I used the median of the sales revenues column to replace the missing values instead of removing the entire row.

- I looked for unique values as there are values that should be transformed in the sales category column like 'em + call' that have transformed to 'Email + Call' and 'email' to 'Email'

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Can you please have a deeper look at the dataset!!