# Samples and surveys

When we collect data it's important to know what type of data we're collecting and how to collect it properly.

## Problem 1: Qualitative and quantitative data

A survey was given that included data on each student's field of interest, age in years, number of languages spoken, and handedness.
DavidBeccaPaige...
Field of interestcomputer sciencejournalismchemistry...
Age (years)$13$$15$$14$...
Languages spoken$2$$1$$1$...
Handedrightleftright...

## Problem 3: Sampling methods

Willy wants to find what percent of students at his school drink the milk after they finish their cereal. He is considering the following sampling methods: