PSC 302 Fernandez Exam II UNLV

When would probability sampling would not be appropriate?

when you cant get a total population

What is quota-sampling design?

A type of nonprobability sampling in which units are selected into a sample on the basis of prespecified charecteristics, so that the total sample will have the same distribution of charecteristics assumed to exist in the population being studied.

Findings of Matland

Gender schemata is in norweigin politics, women are better at womens rights, care fo rthe elderly, childcare. men are perceived better at agriculture and national defense

what is probability sampling

Generalizing from a sample to a larger population is called probability sampling and involves random selection.

with surveys conducted on the internet, Can you anticipate possible problems concerning sample frames, representattiveness and the like? Do you see any solutions?

There is no homogenous structure to sample from with the internet, the solution would be to identify a group.

Matland 1994 Reading

Women in politics of norway

Why in Matland used experimental process/research method

by employing randomization to control for extraneous factors that might influence the dependent variable; secondly, by ensuring a clear causal ordering between the independent and dependent variables

Snowball sampling

pg 208, a nonprobability sampling method, used in field research whereby each person interviewed may be asked to suggest additional people for interviewing.

What is nonprobability sampling?

pg. 206 Any technique in which samples are selected in some way not suggested by probability theory. Examples include relaice on avaialbe subjects as well as purposive (judgemental) snowball and quota sampling

In the discussion of the 1948 Gallup poll that predicted that Thomas Dewey would defeat Harry Truman for president, what are some ways Gallip could have modified his quota-sampling design to avoid the error?

pg. 206 Polls should have continued past october because there was a trend leaning towards truman. his quota sampling came primarily through the US census of 1940, but by 1948 wwii produced a movement from the country to citites, chanign the us population from what the census descripted. City dwellers tend to vote democratic, so rural voters were overrepresented.

Types of nonprobability sampling?

pg. 206, snowball sampling, quota sampling, selecting informats

quota sampling

pg. 208 units are selected into sample on bassis of prespecified charecteristics assumed to exist in population studied.

types of probability sampling

pg. 210 EPSEM, PPS, simple random sampling, systematic sampling

selecting informats

pg. 210 may be marginal or atypical, ex) gangs

What is representatitveness?

pg. 213 that quality of a sample of having the same distrivution of charectersistics as the popularion from which it was selected. Aim: make sample a representative of population from which it selected

EPSEM

pg. 213, equal probability of selection method, meaning each member of a population has the chance of being selected into the sample

Random Sample

pg. 214, 215 each element has an equal chance of getting selected, ex) heads or tails coin

Whar is a sample frame?

pg. 224 list of elements ex) if a sample of students is picked from a student roster, the rosfter is the sampling frame

Using Appendix B of this book, select a simple random sample of 10 numbers in the range from 1 to 9,876. What is each step in the process?

pg. 226 You will need at least ten 2-digit numbers, agree to whivh two digits to choose out of the 5, decide on a radom way to pick the groupings of number

What are the three steps involved in selecting a multistage cluster sample of students taking first year english in US Colleges and Universitites?

pg. 234 Listing and Sampling. listing would involve getting lists of us colleges and univeristites, then sampling the students that are in their first year of english.

What is a multistage cluster sample?

pg. 234 sampling in which natural group or clusters are sampled initially, with the members of each selected group being subsampled afterward. It is probability sampling