BIOS 2010 Lecture 2: Chapter 2

32 views3 pages

Document Summary

Drug approval: the fda requires positive results from a clinical trial before approving new drugs. Allocation of resources assessing risk factors for disease. Continuous- can take any real numerical value over and interval. Data are continuous if between any two possible values, we can also find another possible value, ex: fractions and decimals, age, weight. A categorical variable places an individual into one of several groups or categories. Nominal- qualitative and unordered, ex: hair color, blood type, race. Binary/ dichotomous if values fall into exactly two unordered categories, ex: gender, presence or absence of a disease. Ordinal- naturally ordered categories, ex: stages of cancer, age, letter grades, likert scales. Counts are sometimes referred to as frequencies, often. Counts are sometimes referred to as frequencies, often denoted as n. Frequencies are appropriate for comparison only when the groups have the same total. Proportions are sometimes referred to as relative frequencies.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related textbook solutions

Related Documents