basic-statistics-calculator

# Basic Statistics Calculator ## What This Skill Does Performs and explains basic statistical calculations — percentages, percentage changes, per-capita rates, averages, medians, and ratios — from data you provide, showing the working so you can verify it and use the figures confidently in a story. ## When To Use This Skill - You have raw numbers from a dataset, report, or public record and need to calculate percentages, rates, or changes for your story - You want to double-check a statistic before publishing — paste the source figures and have the calculation verified step by step - You are writing a data-driven story and need to express a finding as a per-capita rate, a percentage change, or a comparison ratio that readers will understand - You are not confident in your math and want the working shown so you can follow the logic and catch any errors ## What You Need To Provide **Required:** The raw numbers or data points; the calculation you need (percentage, percentage change, per-capita rate, average, median, ratio, or "tell me what is most useful for this story"); the context — what these numbers represent and where they come from. **Optional:** The population or base figure for per-capita calculations; the time period the data covers; the comparison you want to make (year-over-year, city-to-city, before-and-after); the audience level (general public, specialist readers, other journalists); how you plan to use the result (headline figure, in-text comparison, chart la...