A baseball fan argues Mike Trout is better than Aaron Judge — and within seconds both sides are quoting batting averages, not opinions. Data analysis turns a raw list of numbers into summary statistics that actually mean something. The mean (average) is the sum divided by the count; the median is the middle value when sorted, immune to outliers — which is why economists quote median household income (about $80,000 in the US) rather than the mean, since a few billionaires would drag the average skyward.

The mode is the most frequent value, the range spans max minus min, and the standard deviation measures the typical distance from the mean — test scores with a small standard deviation mean the class performed uniformly, while a large one flags a split between strugglers and stars. Coaches use these to evaluate players, teachers to curve exams, fantasy managers to compare quarterbacks' weekly consistency, and businesses to summarize sales. Enter your dataset and the calculator returns the full statistical portrait.

With the pre-filled defaults — Variable A 10, Variable B 5 — the Data Analysis Calculator returns Result 50.0000. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.