Data Cleaning and Standardization PCAD-31 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which formula correctly represents min-max scaling?

   • A(x - max) / (max - min)
   • B(x - mean) / std
   • C(x - min) / std
   • D(x - min) / (max - min)
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   Which of the following is an appropriate method to handle outliers in a dataset?

   • AIgnore outliers and proceed with analysis
   • BRemove rows containing outliers
   • CConvert outliers to missing values
   • DReplace all outliers with the mean of the column
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   Which of the following is an example of standardizing data formats?

   • ADetecting outliers using the IQR method
   • BConverting all date strings to a single format like YYYY-MM-DD
   • CRemoving rows with missing values
   • DScaling numerical features to a range of 0 to 1
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which of the following is a common method to detect duplicate rows in a pandas DataFrame?

   • Adf.describe()
   • Bdf.corr()
   • Cdf.duplicated()
   • Ddf.isnull()
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6. 25foundation · easy

   Which pandas method is used to remove rows containing missing values?

   • Adf.dropna()
   • Bdf.astype()
   • Cdf.replace()
   • Ddf.fillna()
   Reveal Solution Discussion Select an answer first