Cluster sampling divides the population into groups, then takes a random sample from each cluster.
What is a voluntary response sample? A sample in which the subjects themselves decide whether to be included in the study.
What is the difference between an outcome and an event? An outcome is the result of a single probability experiment. An event is a set of one or more possible outcomes. If you roll a six-sided die six times, you will roll an even number at least once.
Stratified random sampling divides a population into subgroups. Random samples are taken in the same proportion to the population from each of the groups or strata. The members in each stratum (singular for strata) formed have similar attributes and characteristics.
Voluntary response sample: The researcher puts out a request for members of a population to join the sample, and people decide whether or not to be in the sample. Example—A TV show host asks his viewers to visit his website and respond to an online poll.
A voluntary response sample can be defined as a sample made up of participants who have voluntarily chosen to participate as a part of the sample group. Participants in a voluntary response sample usually choose to respond to surveys because they have a strong opinion on the subject of the survey.
Outcome and event are not synonymous. Yes, an outcome is the result of a random experiment, like a rolling a die has six possible outcomes (say). However, an "event" is a set of outcomes to which a probability is assigned. One possible event is "rolling a number less than 3".
Which of the following is the best definition of "Event"in the context of probability experiment? A set of 1 or more outcomes of an experiment.
What is the difference between independent and dependent events? Two events are independent when the occurrence of one event does not affect the probability of the occurrence of the other event. Two events are dependent when the occurrence of one event affects the probability of the occurrence of the other event.
There are four main types of probability sample.Simple random sampling. In a simple random sample, every member of the population has an equal chance of being selected. ... Systematic sampling. ... Stratified sampling. ... Cluster sampling.
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.
Snowball sampling is a recruitment technique in which research participants are asked to assist researchers in identifying other potential subjects.
Confounding in a study occurs when the effects of two or more explanatory variables are not separated. Therefore, any relation that may exist between an explanatory variable and the response variable may be due to some other variable or variables not accounted for in the study.
What is a lurking variable? A lurking variable is an explanatory variable that was not considered in a study, but that affects the value of the response variable in the study. In addition, lurking variables are typically related to explanatory variables in the study.
Factor. A variable whose effect on the response variable is to be assessed by the experimenter.
Statistics . Statistics is the science of collecting, organizing, summarizing, and analyzing information to draw a conclusion and answer questions. In addition, statistics is about providing a measure of confidence in any conclusions.
In a single-blind experiment, the subject does not know which treatment is received. In a double-blind experiment, neither the subject nor the researcher in contact with the subject knows which treatment is received. Goals scored by a soccer player. Discrete because it's countable.
A retrospective study requires that individuals look back in time or require the researcher to look at existing records. A prospective study collects the data over time. Explain the difference between a single-blind and a double-blind experiment.