Data analysis is the process of examining raw data to find trends, patterns and insights. It helps organizations to make informed decisions when using statistical, mathematical and calculation techniques.

Data analysis generally refers to the process of assembling, cleaning, interpreting, transforming and modeling data to gain insight or conclusions and generate reports to help companies become more profitable. The following diagram illustrates the various steps involved in the process:

Duplicate spelling entrances and errors. Data quality can be hampered and reduced by these errors. The representation of the data obtained from various sources may differ. It can cause a delay in the analysis process if the collected data is combined after being cleaned and organized. Another major challenge in data analysis is incomplete data. This would invariably lead to defective errors or results.