Mean, Median, and Mode

6.DS.4 · Unit 8 · Lesson 2

Name   Period

Objectives / Objetivos

Content Objective: I can find the mean, median, and mode of a data set.

Language Objective: I can explain my reasoning using the words mean, median, mode, and outlier.

Key Idea / Idea clave

Mean = add then divide, median = the middle of the ordered numbers, mode = the value that shows up most.

I Notice / Observo

  • What are the highest and lowest scores?
  • Do any scores repeat?

I Wonder / Me pregunto

  • Will the mean and median be the same number?

Vocabulary / Vocabulario

Term / TérminoDefinition / Definición
Mean
Media		The average. Add all the numbers, then divide by how many there are.
El promedio. Suma todos los números y divide entre cuántos hay.
Median
Mediana		The middle number when you put them in order.
El número del medio cuando los pones en orden.
Mode
Moda		The number that shows up most often.
El número que aparece más veces.
Outlier
Valor atípico		A number that is much bigger or smaller than the rest.
Un número mucho mayor o menor que los demás.
Data distribution
Distribución de datos		How the data looks: where it sits and how spread out it is.
Cómo se ven los datos: dónde están y qué tan separados están.
Variability
Variabilidad		How spread out the numbers are.
Qué tan separados están los números.

Practice Preview / Vista previa de práctica

  1. Find the mean of: 10, 14, 8, 12, 16
    1. 12
    2. 14
    3. 10
    4. 60
  2. Problem 2
  3. Match each measure to its definition.
  4. Find the Stats Error
    1. Step 1: Data set — 12, 15, 18, 15, 20
    2. Step 2: Find mean — Sum = 80, Count = 5, Mean = 80 ÷ 5 = 16
    3. Step 3: Find median — Ordered: 12, 15, 15, 18, 20 → Median = 15
    4. Step 4: Find mode — Mode = 18 (the biggest number)

    Which step has the mistake? Explain it and write the correct work.

Reflection / Reflexión

One thing I learned today / Una cosa que aprendí hoy: