Class Notes (809,444)
Canada (493,713)
Biology (6,677)
Lecture 14

Bio2244 Lecture 14, 15, 16 and 17.docx

3 Pages
Unlock Document

Western University
Biology 2244A/B
Angela White

Lecture 14, 15, 16, 17 Inference about Two Proportions - Requirements o Both are SRS o Independent – samples from one population not related to samples from the other  In other words, samples don’t have anything to do with each other o For both sample, number of successes and number of failures is at least five - Notation o P1 – population proportion o N1 – size of sample from pop. 1 o X1 – number of successes from pop. 1 o P-hat1 – sample proportion for pop. 1 o Q-hat1 - Finding x1 and x2 o X1 = n1*p-hat1 - Hypothesis testing o ONLY TEST that p1=p2 - Pooled estimate of p1 and p2 o P-bar = (x1+x2)/(n1+n2) - For TEST STATISTIC FOR TWO PROPORTIONS o TESTING PROPORTIONS ALWAYS USE Z-SCORES - Confidence intervals for proportions o Estimate of DIFFERENCE BETWEEN POPPULATION PROPORTIONS Inference about TWO MEANS – INDEPENDENT VS DEPENDENT*** - Independent – if values from one population don’t aff
More Less

Related notes for Biology 2244A/B

Log In


Don't have an account?

Join OneClass

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

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.