The Statistics Calculator is a comprehensive tool designed for step-by-step statistical analysis, ideal for students and researchers. Unlike other calculators where you input all data at once, this tool allows you to build your dataset incrementally, making it easier to manage and verify your entries. The main display shows your current number entry or the result of a calculation. You enter a number using the keypad and then press the 'ADD' button to include it in your dataset, which is visible in the scrollable list on the right. This lets you keep track of all the data points you've entered. Once your dataset is populated, you can perform a variety of statistical calculations with a single button press. The 'x̄' button calculates the mean (average) of your data. The 'n' button shows you the count of data points you have entered. For summations, 'Σx' calculates the sum of all values, and 'Σx²' calculates the sum of the squares of all values, which are intermediate steps for many statistical formulas. For measures of dispersion, the calculator provides both sample standard deviation ('s') and population standard deviation ('σ'). This is a crucial distinction: 's' should be used when your data is a sample of a larger population, while 'σ' is used when your data represents the entire population. To manage your session, the 'C' button clears the current number entry on the display, while the 'CAD' (Clear All Data) button completely erases the dataset, allowing you to start a new analysis from scratch.