Intro to Statistics-Quarter 2

Chapter 4:
Describing Distributions

Data analysis is the art of describing data using graphs and numerical summaries. The purpose of data analysis is to help us see and understand the most important features of a set of data by plotting the data, interpreting what you see and summarizing the data.

Chapter 5:
The Normal Distributions and Government Statistics

The overall pattern of a large number of observations is so regular that we can describe it by a smooth curve, called a normal distribution. Normal curves have properties that make them easy to use and apply. The second part introduces the Consumer Price Index as it relates to government policy and decisions by businesses and individuals.

Chapter 6:
Describing Relationships

The relationship between two quantitative variables can be calculated using scatterplots, correlation and regression lines. Data analysis involves the study of causation and cause/effect relationships on two quantitative variables as it relates to statistical evidence.