Hypothesis Tests Simplified: The Big Picture of Statistics

Alt-text: A visual representation of the poll conducted about the opinions of Fast Technologies customers about the quality of the hard drive. The large population, which represents all Fast customers, and data was produced from 1082 of these customers by asking them how many stars they would rate the product. In the data set we have 1082 responses, and exploratory data analysis tells us that 65% gave the product 4 stars. Using both probability and inference, we can draw the conclusion that we are 95% sure that the population percentage is within 3% of 65% (i.e. between 62% and 68%).

The Big Picture of Statistics¹ The process of statistics starts when we identify what group we want to study or learn something about. We call this group the population. Note that the word “population” here (and in the entire course) is not just used to refer to people; it is used in the broader statistical […]

8 vs 15-week Intro Stats Courses

Jason and all: Yes, this is a demanding course for most people. My strong sense is that it, like other statistics courses, should only be taught in the 15-week format. I say that knowing the strong preference among adult students for 8-week or shorter courses they can more quickly check as “Completed” on their degree […]