stat 2300 1.4-.6

studied byStudied by 1 person
5.0(1)
Get a hint
Hint

stratified sample

1 / 24

flashcard set

Earn XP

Description and Tags

25 Terms

1

stratified sample

guarantees that each stratum is represented in the sample. divides the population into separate groups called Strata and then selects are simple random sample from each stratum. The individuals within its stratum should be homogeneous or similar in someway with respect to the variable of interest.

<p>guarantees that each stratum is represented in the sample. divides the population into separate groups called Strata and then selects are simple random sample from each stratum. The individuals within its stratum should be homogeneous or similar in someway with respect to the variable of interest.</p>
New cards
2

strata

definite subgroups in a population

New cards
3

cluster sample

selects whole cluster divides the population into a large number of clusters such as city blocks. Then a simple random cluster is selected and all individuals in the selected clusters are included for the sample. For personal interviews when the subjects of a cluster or close geographically cluster sampling is less expensive per observation then simple random sampling.

<p><em>selects whole cluster</em> divides the population into a large number of clusters such as city blocks. Then a simple random cluster is selected and all individuals in the selected clusters are included for the sample. For personal interviews when the subjects of a cluster or close geographically cluster sampling is less expensive per observation then simple random sampling.</p>
New cards
4

systematic sampling

obtained by selecting every KTH individual from a population. The first individual selected corresponds to a random number between one and K. Systematic sampling does not require a list of individuals in the population.

<p>obtained by selecting every KTH individual from a population. The first individual selected corresponds to a random number between one and K. Systematic sampling does not require a list of individuals in the population.</p>
New cards
5

clusters

small groups of people or things that are close together

New cards
6

convenience sample

choosing individuals who are easiest to reach, suspect data, uses voluntary response samples

<p>choosing individuals who are easiest to reach, suspect data, uses voluntary response samples</p>
New cards
7

voluntary response samples

People decide whether to join a sample based on an open invitation; particularly prone to large bias.

New cards
8

Bias

leads to a sample that is systematically different from the population with respect to the variable of interest

New cards
9

sampling bias

a flawed sampling process that produces an unrepresentative sample (non-random sampling, under coverage)

New cards
10

No response bias

bias that results when respondents differ in meaningful ways from non-respondents

New cards
11

response bias

tendency of subjects to systematically respond to a stimulus in a particular way due to nonsensory factors, maybe they are lying or wording of questions or misleading or confusing questions

New cards
12

experiment

A controlled study conducted to determine the effect that is very in one or more explanatory variables or factors has on a response variable. has causation

New cards
13

factors/explanatory variables

causes response variable

New cards
14

treatment

any combination of the values of the factors

New cards
15

experimental units

the persons or objects upon which a treatment is applied

New cards
16

subjects

Experimental units that are human beings.

New cards
17

control/comparison group

allows the researcher to analyze the effectiveness of the primary treatment. serves as baseline

New cards
18

placebo

A harmless pill, medicine, or procedure prescribed more for the psychological benefit to the patient than for any physiological effect. ppl think that they get something. usually control group won't get anything.

New cards
19

Randomization

a process of randomly assigning subjects to different treatment groups

New cards
20

blinding the study

allows the researcher to treat the treatment groups as equally as possible, single-blind and double blind

New cards
21

single-blind experiment

an experiment in which the participants are unaware of which participants received the treatment

New cards
22

double-blind experiment

an experiment in which neither the experimenter nor the participants know which participants received which treatment

New cards
23

replication

repeating the essence of a research study, usually with different participants in different situations, to see whether the basic finding extends to other participants and circumstances

New cards
24

design

to describe the overall plan in conducting the experiment

New cards
25

completely randomized design

each experimental unit is randomly assigned to a treatment

New cards

Explore top notes

note Note
studied byStudied by 178 people
... ago
5.0(3)
note Note
studied byStudied by 10 people
... ago
5.0(1)
note Note
studied byStudied by 36 people
... ago
5.0(1)
note Note
studied byStudied by 164 people
... ago
5.0(3)
note Note
studied byStudied by 18 people
... ago
5.0(1)
note Note
studied byStudied by 87 people
... ago
5.0(1)
note Note
studied byStudied by 42 people
... ago
5.0(2)
note Note
studied byStudied by 234 people
... ago
5.0(1)

Explore top flashcards

flashcards Flashcard (465)
studied byStudied by 29 people
... ago
5.0(1)
flashcards Flashcard (108)
studied byStudied by 8 people
... ago
5.0(1)
flashcards Flashcard (55)
studied byStudied by 7 people
... ago
5.0(1)
flashcards Flashcard (45)
studied byStudied by 28 people
... ago
5.0(1)
flashcards Flashcard (136)
studied byStudied by 5 people
... ago
5.0(1)
flashcards Flashcard (49)
studied byStudied by 37 people
... ago
4.7(3)
flashcards Flashcard (41)
studied byStudied by 75 people
... ago
5.0(2)
flashcards Flashcard (57)
studied byStudied by 25 people
... ago
5.0(1)
robot