Callie

Created by

Mellin Dre Callie Burgos

Cards (17)

Statistics 
A branch of Applied Mathematics specializing in procedures for collecting, organizing, presenting, analyzing and interpreting data from observations
Statistics 
Helps in gathering information, understanding patterns, and making inferences about the world around us
Data 
Units of information, often numeric, recorded and used for the purpose of analysis
Statistical question 
One that can be answered by collecting data
Types of data 
Qualitative
Quantitative
Qualitative data/variables 
Measure a quality or characteristic of the population being studied, take non-numerical values, such as colors, information or questions that are answerable by YES or NO, labels, etc.
Qualitative data 
Hair color, religion, gender, occupation
Quantitative data/variables 
Measure a number or an amount
Quantitative data 
Height, weight, age, income
Types of numerical variables
Discrete
Continuous
Discrete numerical variable 
A numerical variable that is either finite or countable and when obtained by counting
Discrete numerical variables 
Family size, number of wins of a sport, the result of rolling 3 dice, number of boys and girls in grade 7 per section
Continuous variable 
A numerical variable which represents infinitely many possible values that can be associated with the points on the number line, obtained through measurement
Continuous variables 
Height, weight, temperature, wind velocity, age of persons, distance travelled by an airplane over time
Functions or uses of statistics
Education
Government
Medicine & Physical Sciences
Business & Economics
Ungrouped frequency distribution 
Classifies a given data set (usually n≤30) under a specific category or class, frequencies of each data is treated as individual data points or as discrete data
Grouped frequency distribution 
Having an interval or ratio-level data, and beyond a sample size of 30, frequencies of each data point are clustered in a specific class interval