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Python for Data Cleaning

bookData Consistency Techniques

Data consistency is a key aspect of data cleaning, directly affecting the reliability and accuracy of your analysis. Common consistency issues include inconsistent categories, such as variations in spelling or capitalization within a column that should contain uniform values; mixed data types, where a single column contains both strings and numbers, making calculations or grouping unreliable; and formatting errors, such as inconsistent date formats or misplaced whitespace. These problems can lead to misleading results or errors in downstream analysis if not properly addressed.


              
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import pandas as pd

data = {
    "City": ["New York", "new york", "Los Angeles", "los angeles", "Chicago", "CHICAGO"],
    "Population": [8000000, "8000000", 4000000, "4000000", 2700000, "2,700,000"]
}

df = pd.DataFrame(data)
print(df)
copy

1. Why is data consistency important in analysis?

2. Which pandas method can convert a column to a specific data type?

question mark

Why is data consistency important in analysis?

Select the correct answer

question mark

Which pandas method can convert a column to a specific data type?

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 3. ChapterΒ 1

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bookData Consistency Techniques

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Data consistency is a key aspect of data cleaning, directly affecting the reliability and accuracy of your analysis. Common consistency issues include inconsistent categories, such as variations in spelling or capitalization within a column that should contain uniform values; mixed data types, where a single column contains both strings and numbers, making calculations or grouping unreliable; and formatting errors, such as inconsistent date formats or misplaced whitespace. These problems can lead to misleading results or errors in downstream analysis if not properly addressed.


              
123456789

            
import pandas as pd

data = {
    "City": ["New York", "new york", "Los Angeles", "los angeles", "Chicago", "CHICAGO"],
    "Population": [8000000, "8000000", 4000000, "4000000", 2700000, "2,700,000"]
}

df = pd.DataFrame(data)
print(df)
copy

1. Why is data consistency important in analysis?

2. Which pandas method can convert a column to a specific data type?

question mark

Why is data consistency important in analysis?

Select the correct answer

question mark

Which pandas method can convert a column to a specific data type?

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 3. ChapterΒ 1
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