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)131315151414...
Languages spoken221111...
Handedrightleftright...

Problem 2: Representative samples

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:

Problem 4: Biased wording in survey questions