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Which of the following methods is most commonly used for ensuring that time series data is stationary?

During the data analysis process, which step is crucial for ensuring data accuracy before any modeling or interpretation?

In a structured database, which data storage format would best support hierarchical data with varying levels of nested attributes?

Why is sampling an essential technique in data analysis?

In descriptive statistics, what is the main advantage of using the median over the mean as a measure of central tendency in data analysis?

In data cleaning, which technique is most effective in handling outliers in a dataset that could skew analysis?

Which of the following is a key advantage of using box plots over histograms for visualizing data?

Which of the following statements best describes the primary difference between big data and traditional data?

Which method would be most effective in identifying the relationship strength between two continuous variables?

Which of the following is the most critical factor for implementing predictive analytics in the finance industry for risk modeling?