Statistician
Present findings, question a survey, and explain probability — in precise Spanish, out loud.
The working vocabulary is a precise core — la muestra (the sample), la media aritmética and la mediana, el margen de error, el intervalo de confianza — plus the everyday words people actually reach for: in Mexico the average is el promedio, in Spain la media. The one line every Spanish-speaking analyst keeps ready is correlación no es causalidad — correlation isn't causation. And in the &Be lessons there are no flashcards or drills: you learn each term by saying it while you present real numbers and defend them.
Below: the vocabulary lesson by lesson — from sampling to chi-squared — how analysts in Mexico, Argentina and Spain really talk about data, and a way to rehearse a full presentation out loud.
The warm-up pack
The lines analysts actually say defending a number, not the ones written in a methodology section.
01 · Calling out a weak sample
La muestra está bien chiquita, no representa nada.
The sample is really small, it doesn't represent anything. (Mexico)
Bien chiquita, not just pequeña — the intensifier is what makes it sound like a real critique in a meeting, not a textbook observation.
02 · The Spanish way to say 'garbage sample'
No te fíes de esa muestra, es un percal.
Don't trust that sample, it's junk. (Spain)
Percal is Spanish slang for something shoddy — call a sample that and everyone in the room knows exactly what you think of it.
03 · Why analysts distrust the average
La media te la cuela, mejor mira la mediana.
The mean fools you — better to look at the median. (Spain)
Cuela literally means it 'sneaks past' you — the mean can slip a misleading number by if you're not also checking the median.
04 · The outlier warning
Mi pana, la media miente cuando hay outliers.
Careful, the mean lies when there are outliers. (Colombia)
Mi pana — Colombian for 'buddy' — turns a statistics warning into something you'd actually say to a colleague, not read off a slide.
05 · Putting a number on your confidence
Tiene como un noventa de probabilidad, palabra.
It's got like a ninety percent probability, seriously. (Mexico)
Palabra at the end is Mexican for 'I mean it' — it turns a probability estimate into something you're standing behind.
06 · The line every analyst keeps ready
Correlación no es causalidad, ¡no te claves!
Correlation isn't causation, don't get hung up on it! (Mexico)
This is the sentence every Spanish-speaking analyst keeps loaded — say it the moment someone jumps from 'correlated' to 'caused'.
07 · Flagging a bad survey
La encuesta tiene sesgo, salió rara la muestra.
The survey is biased, the sample came out weird. (Mexico)
Sesgo is the word for bias — naming it directly, out loud, is how you push back on a flawed survey in a meeting.
08 · Standing behind your result
Es estadísticamente significativo, te lo firmo.
It's statistically significant, I'll stake my name on it. (Spain)
Te lo firmo — literally 'I'll sign it' — is how you back a result with your name, more direct than just 'significativo'.
09 · Naming the point wrecking your chart
Mi pana, ese outlier te está rompiendo el gráfico.
Careful, that outlier is wrecking your chart. (Colombia)
Outlier stays in English even in Colombian Spanish — say it exactly like this and everyone knows which point you mean.
10 · Reading the trend line out loud
La tendencia va para arriba, oye, súper marcada.
The trend is going up, really sharply. (Chile)
Súper marcada makes the trend impossible to miss — this is how you point at a chart and make sure everyone sees what you see.
11 · Complimenting someone's chart (Spain)
La viz está currada, mola un montón.
The data viz is well done, it's great. (Spain)
Currada and mola are pure Spain — a compliment casual enough for a coffee break, not a formal review.
FLUENT
Finally, someone to talk to in Spanish.
Ten-minute spoken lessons. A teacher who answers back — and gently fixes what you got wrong.
First 10 lessons freeandbefluent.com/spanish/statisticianRegional Spanish
Textbooks teach one word. Locals use several — pick your region's and stay consistent.
Watch out
The part no drill site can do
Olivia
Your vocabulary teacher for this pack
Nothing here is a worksheet. In the Statistician lessons, Olivia makes you the analyst in the room: you present survey results and she presses you on la muestra and el margen de error; you explain la correlación and la regresión to a colleague who wants it in plain language; you brief a decision-maker on la tendencia in the polling data. Every term gets said out loud, with your own numbers behind it — that's how it sticks.
Blank mid-sentence and nothing bad happens — she waits. That's the practice, without unnecessary judgement.
Finish the 6 lessons and Statistician is yours — earned, not given.
First 10 lessons free · 10-minute spoken lessons · your AI coaching team remembers you
Quick answers
The textbook mean is la media aritmética and the median is la mediana. In everyday Mexican Spanish the average is el promedio; in Spain it's la media — with the classic warning la media te la cuela, mejor mira la mediana (the mean fools you, look at the median).
A survey is la encuesta, an opinion poll el sondeo de opinión. Report it with el margen de error, el intervalo de confianza and the sample size — and if something looks off, say so plainly: la encuesta tiene sesgo (the survey is biased).
Correlación no es causalidad — Mexican analysts add ¡no te claves! (don't get hung up on it). The precise habit behind the slogan: say está correlacionado con rather than causa unless you can prove it.
El valor atípico — though in a Colombian meeting you might hear it in English: ese outlier te está rompiendo el gráfico (that outlier is wrecking your chart). It's the reason the median often beats the mean: la media miente cuando hay outliers.
A bar chart is el gráfico de barras — in Mexico usually la gráfica de barras — and a scatter plot is el diagrama de dispersión. Point at the pattern with la tendencia (the trend): la tendencia va para arriba.
