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How much data is needed to have a representative sample of the population?
The answer depends on the variability of the characteristic that is being measured.
What is the defining characteristic of a random sample?
Each member of the population has the same probability of being in the sample as any other. Equivalently, any set of members of the given sample size has the same probability of being selected as any other set.
What are conditions of an experiment that does not vary from sample to sample?
Conditions of an experiment that do not vary from sample to sample are referred to as controlled variables or constants. These are factors that are kept the same throughout the experiment to ensure that any observed differences in the outcomes can be attributed solely to the independent variable being tested. By maintaining these consistent conditions, researchers can enhance the reliability and validity of their results. Examples include temperature, time, and the materials used in the experiment.
What is the sample size for a population of 20000?
The sample size will depend on a number of factors other than the populatoin.These include:the resources (time, money) available for data collection, cleaning and validation, input and storage, and analysis;the implications of getting the answer wrong;the variability of the characteristic that is being measured;whether or not a simple random sample is the best sampling scheme.
How is a sample is termed if it has similar characteristics to the population being studied.?
what is the type of sample in which each member of the sample set or group has an equal chance of being chosen
What sample size is sufficient for stat?
A sample size of one is sufficient to enable you to calculate a statistic.The sample size required for a "good" statistical estimate will depend on the variability of the characteristic being studied as well as the accuracy required in the result. A rare characteristic will require a large sample. A high degree of accuracy will also require a large sample.
What is a Variable being tested or measured?
A variable being tested or measured is an aspect or characteristic that is being observed or assessed in an experiment or study. It is typically manipulated or controlled to determine its impact on the outcome or results of the research.
How much data is needed to have a representative sample of the population?
The answer depends on the variability of the characteristic that is being measured.
What is the primary characteristic of a probability sample?
In the context of a sample of size n out of a population of N, any sample of size n has the same probability of being selected. This is equivalent to the statement that any member of the population has the same probability of being included in the sample.
What do you call a sample that goes through all the steps of an experiment and does not contain the factor being tested?
a control
How long can a urine sample be kept for if it is being tested for alcohol?
6 hours, 12 hours in the refirgerator.
What do you call a sample that goes through all the steps of an experiment and does not contain a factor being tested?
a control
What is the defining characteristic of a random sample?
Each member of the population has the same probability of being in the sample as any other. Equivalently, any set of members of the given sample size has the same probability of being selected as any other set.
Why is complete clotting necessary in blood banking test?
to identify the blood type of the patient or the sample being tested
How long does a urine sample stay good for if being tested for THC?
A urine sample usually lasts up to 7 days if frozen.
What do you call sample that goes through all the steps of an experiment but does not contain the variable being tested?
A sample that goes through all the steps of an experiment but does not contain the variable being tested is called a control group. The control group serves as a baseline to compare the effects of the variable in the experimental group, helping to isolate the impact of the variable being tested. This comparison is essential for validating the results of the experiment.
What do you call a sample that goes through all the steps of an experiment except the one being tested?
The control, or control group, goes through all the steps of an experiment, but does not contain the factor being tested, which is called the experimental variable or independent variable.
