April 2014
Intermediate to advanced
736 pages
20h 32m
English
Content preview from Statistics: Principles and Methods, 7th Edition
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.
13
Analysis of Categorical Data
1 Formulating Testing Problems Concerning Categorical Data
2 Pearson's χ2 Test for Goodness of Fit
3 Contingency Table with One Margin Fixed (Test of Homogeneity)
4 Contingency Table with Neither Margin Fixed (Test of Independence)
Are Firm Mattresses Really Best?
Although it is commonly believed that firm mattresses can help persons with low-back pain, experimental evidence is lacking. Medical researchers conducted a carefully designed experiment.1 Of the patients admitted to the study, 158 were randomly selected to sleep on a new firm mattress and the others were given new medium-firm mattresses. The patients were not told about the firmness of their new mattresses although most perceived the correct firmness. The persons who installed the new beds and the research assistants who collected the data from patients were also kept unaware of the firmness of the mattresses.
This design includes meritable features: (1) the random assignment of treatments (mattress firmness) and (2) the double blind feature where patient and researcher are not told which treatment has been assigned.
The patients were asked to report whether or not they had low-back pain upon arising during the 90-day follow-up period.
The proportion with no low-back pain upon arising ...
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.