School

University of Guelph
Department

Sociology and Anthropology

Course Code

SOAN 3120

Professor

Michelle Dumas

10/31/2013

Chapter 17-Review

-sampling chapter 8

identify the population in a sampling situation

recognize bias due to voluntary response samples and other inferior sampling methods; people respond to

random surveys typically because they have a strong opinion about what is being asked

use Table B of random digits to select a SRS from a population

know different ways of sampling: stratified random sampling (stratify by region)

Recognize the presence of under coverage and nonresponse as sources od error in a sample survey

Ex- the survey found that 76% of males and 86% of females in the sample had visited a general practitioner

at least once in the past year. Do you think these estimates are close to the truth about the population; yes

because the sample size is large enough to be accurate

-experiments chapter 9

recognize whether a study is observational study or an experiment

recognize bias due to confounding of explanatory variables with lurking variables in either observational or

experimental studies

identify the factors (explanatory), treatments, response variables and individuals or subjects in an

experiment

use table B of random digits to carry out the random assignments of subjects to groups in a completely

randomized experiment

recognize the double-blind technique and when it should be used

Ex-gender, age, education etc. are generally explanatory variables

-probability chapter 10

probability describes the long-run regularity of random phenomenon

understand that the probability of an event is the proportion of times the event occurs in very many

repetitions of random phenomenon. Use the idea of probability as long-run proportion to think about

probability

recognize that sampling spaces are all possible outcomes. Know how they are presented

use the basic probability rules to detect illegitimate assignments of probability;

any probability must be a number between 0 and 1 ( 0 to 100%)

the total probability assigned to all possible outcomes must be 1

use basic probability riles to find the probabilities of events that are formed from other events

the probability that an event does not occur is 1 minus its probability

if two events are disjoint, the probability that one or the other occurs is the sum of their individual

probabilities

dijjoint event cannot occur together (I,e, no A AND B)

use the notation of random variables to make compact statements about random outcomes, such as P (x

bar < 4) = 0.3

be able to interpret such statements

use the geberal addition rule to find probabilities that onvolve overlapping events (chapter 12)

use multiplication rule for independent events to find the probability that all of several independent events

occur (chapter 12)

= P (A) + P (B) – P (A-B)

Ex-flip a coin 3 times, how many outcomes are possible:

-first, you need all possible outcomes

-sample space of outcomes:

-S= HHH, HHT, HTH, THH, HTT, THT, TTH, TTT

-notice: each flip has two possible outcomes, so three flips has 2x2x2= 8 possible outcomes

-probability of each outcome = 1/8 (8 possible outcomes)

Ex-what’s the chance that you wont pull out a blue

P (not blue) 1-P(blue)

=1- 0.24

= 0.76

Ex- toss a coin 10 times, record number of heads that occur

How many possible outcomes: 210 =1,024 possible outcomes

-sampling distributions (chapter 11)

identify parameters and statistics in a sampling study

interpret a sampling distribution as describing the values taken by a statistic in all possible repetitions of a

sample or experiments under the same conditions

interpret the sampling distribution of a statistic as describing the probabilities of its possible values

Ex- 100 numbers dialed, 48% are unlisted, 52% of LA phones are unlisted

Over 90% improved by at least one letter grade.

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California

Join OneClass

Access over 10 million pages of study

documents for 1.3 million courses.

Sign up

Join to view

OR

By registering, I agree to the
Terms
and
Privacy Policies

Already have an account?
Log in

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.