Class Notes (835,004)
Anthropology (1,672)
ANT100Y1 (958)
Lecture

# ANTC67 - W9.docx

3 Pages
51 Views

Department
Anthropology
Course
ANT100Y1
Professor
Larry Sawchuk
Semester
Winter

Description
ANTC67 W9  How to do odd’s ratio o Histogram o Normal curve  It tells you what you achieved collectively on both points  Average assignment 10.1/15 = 67%  BV498 – Odd’s  Will do assignment 2 for you  Is the disease associated with exposure or is disease independent of exposure  Odd’s ratio o What is found in cell A and D decided by Cell B and C o If it is close to 1 there is no association o So you want your odd’s ratio to be greater than 1  Dirty Dan the water seller o Increase water-bourn disease? o Refer to agenda aug 29 o You got 13.5. what does this mean?  Null hypothesis (Ho) o Drinking water and cholera are independent o Lack of dependence  Alternative hypothesis (H1) o They are dependent and associated  Compare observed (OR) to expected (OR) o OR is calculated by A and D decided by Cell B and C o This is our critical value o Any value greater than 3.865, we will reject, and say that they are dependent on each other (i.e. cholera happens from drinking dirty water)  Null hypothesis is always one of no association  You are always looking at binary situation Lung cancer  Exposure to something will elevate the risk of cancer o Lung cancer - Smoking o Breast cancer – Breast feed  These would be null-hypothesis. ??? Null hypothesis (condition and exposure have no effect on each other) Condition Exposure Autism (have no relationship with…) MMR vaccination Measles Malnutrition Cardiovascular disease Obesity  Falsify Ho and support H1 2 step process  Collect data and compute OR  Compute chi-square value o Chi-sq tells you whether Odd’s Ratio is due to chance or not.  Does it make sense? Should we make another hypothesis? Example  OR is 4.7  Chi-sq value is 38  So we reject hypothesis of null association  What could be at play her
More Less

Related notes for ANT100Y1
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.