Class Notes (839,246)
Statistics (456)
STATS 2B03 (199)
Aaron Childs (197)
Lecture

# Introduction to biostatistics.docx

2 Pages
139 Views

Department
Statistics
Course Code
STATS 2B03
Professor
Aaron Childs

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Description
September 11 , 2012 STATS 2B03: Statistical Methods for Science Introduction to Biostatistics Scales of measurement (for categorical variables) - nominal scale:  when categories don’t have any order to them  consists if categorizing observations by name only, where the different categories can’t be ranked  e.g. categorizing by gender or race - ordinal scale:  consists of categorizing observations in such a way that the different categorize can be ranked according to some criteria  e.g. low/medium/high income or exercise/do not exercise Organizing data - example: 55, 63, 72, 41, 87, 75, 64, 60 - frequency table:  class boundaries  convention: when the class boundaries overlap, the right class boundary is not included in the interval Grouping Frequency Cumulative Relative Cumulative Frequency Frequency Percent (%) 40-50 1 1 1/8 = 12.5% 12.5% 50-60 1 2 1/8 = 12.5% 25% 60-70 3 5 3/8 = 37.5% 62.5% 70-80 2 7 2/8 =
More Less

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document

Unlock to view full version

Unlock Document
Me

OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Join to view

OR

By registering, I agree to the Terms and Privacy Policies
Just a few more details

So we can recommend you notes for your school.