March 2017
Beginner to intermediate
456 pages
9h 1m
English
Content preview from Statistical Analysis with R For Dummies
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 4
Finding Your Center
IN THIS CHAPTER
Working within your means
Meeting conditions
Understanding that the median is the message
Getting into the mode
If you’ve ever worked with a set of numbers and had to figure out how to summarize them with a single number, you’ve faced a situation that statisticians deal with all the time. Where would this ideal “single number” come from?
A good idea might be to select a number from somewhere in the middle of the set. That number could then represent the entire set of numbers. When you’re looking around in the middle of the set, you’re looking at central tendency. You can address central tendency in a variety of ways.
Means: The Lure of Averages
We’ve all used averages. Statisticians refer to the average as the mean. The mean is an easy way to summarize your spending, your school grades, your performance in a sport over time.
In the course of their work, scientists calculate means. When a researcher does a study, she applies some kind of treatment or procedure to a small sample of people or things. Then she measures the results and estimates ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.