To prove the solution of an equation, we substitute the solution for the in the original equation. (5-2)
1/22/2018 OneNote Online Introduction to Data Monday, January 8,7:14 PM • Chapter one is intended to be an overview (not in depth.) ○ Will be referenced to in the future, perhaps in a chapter. • Statistics is the science of collecting, analyzing, organizing, and summarizing data in order to answer or draw conclusions. ○ Answering questions is different than drawing a conclusion. ○ It is important to interpret data accurately because it can lead to wrong usage. • Data Sources ○ Population ▪ Refers to the entire group. ▪ Can be infinite. ▪ Often difficult to measure entire population. ○ Sample ▪ Subset of population. ▪ Represents group at large. ▪ Easier to obtain information. • Classifying Data ○ Variable ▪ Characteristics ▪ Two types: • Categorical ○ Describes quality or class. ○ Can be numbers, no arithmetic possible. ○ Gender, grade, hair color. • Numerical ○ Describes quantity or measurement. ○ Temperature, width, height. • Stacked Data ○ Data values stored in spreadsheet format. ○ Each row contains data of certain individual.