Chapter 1:Intro To Statistic (Population VS Sample (A population is a…
Chapter 1:Intro To Statistic
Population VS Sample
A population is a collection of all possible individuals, objects, or measurements of interest.
A sample is a portion, or part, of the population of interest
What Is Statistic
Collection and interpretation of data
Types Of Statistic
Methods of organizing, summarizing, and presenting data in an informative way
A decision, estimate, prediction, or generalization about a population, based on a sample.
Types Of Variables
Data that is measured in numbers. It deals with numbers that make sense to perform arithmetic calculation with,
Variables - Height,Weight, Midterm Score
Can only assume certain values and there are usually “gaps” between values.
Can assume any value within a specified range.
Values that place "things" into into different categories
Variables - Hair color,Types of cat, Grades
Data classifications are represented by sets of labels or names (high, medium, low) that have relative values. Because of the relative values, the data classified can be ranked or ordered.
Observations of a qualitative variable can only be classified and counted.There is no particular order to the labels.