A representative sample
is a subset of a population that seeks to accurately reflect the characteristics of the larger group.
What is a characteristic that reflects change?
dependent variable
. a characteristic that reflects a change.
How do you know if a sample is representative of the population?
A representative sample should be
an unbiased reflection of what the population is like
. There are many ways to evaluate representativeness—gender, age, socioeconomic status, profession, education, chronic illness, even personality or pet ownership.
What is meant by representativeness in a sample?
If we can draw accurate conclusions about a population from a sample
, we speak of representativeness. In a narrower sense, a sample is representative, if all of the elements in a population had the same chance to be part of the sample (see also selectivity).
What is the most important characteristic of a sample?
It should be large enough to represent the universe properly
. The sample size should be sufficiently large to provide statistical stability or reliability. The sample size should give accuracy required for the purpose of particular study.
What is the characteristic that causes something to occur?
Characteristics of a Cause. To be a cause, the factor:
Must precede the effect
.
Can be either a host or environmental factor
(e.g., characteristics, conditions, actions of individuals, events, natural, social or economic phenomena)
What is term for a type of analysis that does not influence a person’s behavior?
people have used photographs of the Civil War to analyze the society of that time. … what is term for a type of analysis that does NOT influence a person’s behavior?
nonreactive
. which of the following statements are part of the American Sociological Association’s Code of Ethics?
Does a sample reflect the population?
It is a subset containing the characteristics of a larger population. Samples are used in statistical testing when population sizes are too large for the test to include all possible members or observations. A sample
should represent the population as a whole
and not reflect any bias toward a specific attribute.
How much data is needed to have a representative sample of the population?
Technically, a representative sample requires only
whatever percentage of the statistical population is necessary
to replicate as closely as possible the quality or characteristic being studied or analyzed.
Are random samples representative?
A representative sample is a
group or set chosen from
a larger statistical population according to specified characteristics. A random sample is a group or set chosen in a random manner from a larger population.
What is random sampling example?
An example of a simple random sample would be
the names of 25 employees being chosen out of a hat from a company of 250 employees
. In this case, the population is all 250 employees, and the sample is random because each employee has an equal chance of being chosen.
What is another name for representative sample?
| cross section sampling | sample selection | slice sampler | example range | representation transection |
|---|
Why is it important to choose a representative sample of the population?
A representative sample
allows researchers to abstract the collected information to a larger population
. Most market research and psychological studies are unsuitable in terms of time, money, and resources to collect data on everyone.
What is the characteristic of the sample which is selected randomly?
Definition: Random sampling is a part of the sampling technique in which each sample has an equal probability of being chosen. A sample chosen randomly is meant to be
an unbiased representation of the total population
.
Which of the following is a characteristics of a good sample?
Proportion
: it is not as large as the universe but large enough to understand the population characteristics. Practical: simple and follow the field condition. Accuracy and precision: it is valid from every perspective. The sample design should be such that it results in a small sampling error.
What is the most important characteristic of a probability sample?
The most critical requirement of probability sampling is that
everyone in your population has a known and equal chance of getting selected
. For example, if you have a population of 100 people, every person would have odds of 1 in 100 for getting selected.
