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Data cleaning focuses on resolving inconsistencies, filling missing values, removing duplicates, and handling outliers to ensure the dataset is accurate, complete, and reliable. High-quality data is critical for generating meaningful insights and avoiding analytical errors. For example, incorrect or incomplete customer information in a sales dataset could lead to flawed marketing strategies. Techniques such as imputation, deduplication, and outlier treatment ensure the dataset is ready for analysis. Clean data enables better decision-making and enhances the credibility of data-driven insights. Why Other Options Are Incorrect: • A: Data transformation involves reformatting or scaling data, not cleaning it. • C: Cleaning prepares data for visualization but is not specifically aimed at visualization. • D: Standardization may occur during cleaning but is not its sole purpose. • E: While validation is related to accuracy, cleaning focuses more broadly on quality improvement.
A shopkeeper bought two articles for Rs. 250 each. If he sold one of them at 20% profit and the other at 30% loss, then find the difference between the ...
A dealer buys three different fruits A, B & C at the rate of Rs. 50, Rs. 40 and Rs. x per kg respectively. The quantity (by weight) of B bought by him i...
A shopkeeper bought an article and marked it at Rs. 650. By selling the article at a discount of 4%, he earns a profit of 20%. Find the cost price of th...
A person buys a piece of machinery for ₹60,000. After 1 year, he sells it at a 15% profit and reinvests the entire amount in a new machine. The second...
The selling price of an article by two different vendors is Rs.900 and profit earned is 20%. One vendor counts his profit on cost price while other one ...
A purchased an article for Rs 3500. She sold the article at 12% profit. She then added Rs 500 to the amount received and purchased a purse such t...
A shopkeeper bought an article for Rs. 180. He sold it at profit 30% after allowing a discount of 40%. If instead he had sold it at 20% discount, then f...
A trader bought some orange at 7 for Rs 11. He sold all at 2 for Rs 3. Thereby he losses Rs 30. Find number of oranges sold.
A shopkeeper bought 200 articles at ₹40 each. He sold 120 articles at ₹50 each and the rest at ₹60 each. What is the profit percentage earned by t...
A shopkeeper sells an article for Rs. 506, earning a profit of 15%. If the same article is sold for Rs. 396, what would be the profit or loss percentage?
