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What is the difference between control samples and test experimental samples?
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∙ 12y ago
It calculates the difference between each set of pairs, and analyzes that list of differences. The P value answersthis question: If the median difference in the ... If your samples are small and there are no tied ranks, Prism calculates an ... The whole point of using a paired test is to control for experimental.
Wiki User
∙ 12y ago
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Definition of independent sample.?
two samples are independent if they are drawn from two different populations, and/ or the samples have no effect on each other. eg: We want to estimate the difference between the mean salaries of all male and all female executives. We draw one sample from the population of male executives and another from the population of female executives. These two samples are independent because they come from different populations and the samples have no effect on each other
What are the characteristic of encoder?
It uses the previous few values of samples to predict the value of the next sample It encodes the difference between each actual signal and the predicted signal It reduces the number of bits to be sent
What is a difference between 2 percent and 3 percent agarose gel?
the thickness of the gel varies as you change the conc. of agarose from 2 to 3 percent. the conc. of loading of samples that gel can handle varies.
How can you describe the relationship between mass and volume for these samples?
Relative densities (specific gravity) density of sample = mass / volume
What is the difference between a mixed culture and a contaminated culture?
A mixed culture is a container that holds two or more identified and easily differentiated species of microorganisms. A contaminated culture was once pure or mixed (and thus a known entity) but since had contaminants (unwanted microbes of uncertain identity) introduced into it.
What is the difference between experimental replicates and experimental controls?
Replicates are "repeat" samples under a given condition.
What does control as an experiment means?
A control sample or control group is used to compare with the experimental group or sample. The control sample ideally, should be exactly the same as the experimental sample except that you don't give your experimental treatment to the control sample. Afterwards you compare the 2 samples to see if your experimental treatment had any kind of effect. The control is like a reference point.
Why do you need a molecular weight ruler alongside your samples during electrophoresis?
A molecular weight ruler uses a sample of fragments of a known size (known as a molecular weight marker) to be placed alongside the experimental and control samples. It helps compare the migration distance of the experimental fragments to the migrating distance of the fragments of a known size that make up the molecular weight marker. Then the scientist can calculate an approx. size of their experimental samples.
The procedure designed to ensure that the experimental and control groups do not differ in any way that might affect thee experiment's results is called?
random assignment Random assignment ensures that bias does not cause differences in representative samples divided into experimental and control groups.
Why do you assay your samples in triplicate when performing an elisa test?
Assaying the samples in triplicate is another control. If you do not get the same result in all triplicate wells, you have a problem with your experimental technique or you have made a pipetting error. In a clinical laboratory, the experiment would have to be repeated.
What is the difference between cheek cells seen under the microscope and those illustrated in text books?
The major difference between cheek cells seen under a microscope and those in illustrated text books are the samples used. Different samples will yield different results.?æ
What is the difference between grab and composite samples?
A composite sample is taken over a period of time, while a grab sample is a snap shot of what is in your well at the time you take the sample. Homeowner samples are generally grab samples.
How could you tell the difference in density between the same size samples of quartz and galena?
By deviding the mass by its volume.
Study the acidity of different samples of tea leaves-introduction?
A simple answer is a difference in the taste between different teas.
What is the use of bioassay test panels?
Bioassay test panels includes a tested series of frequently requested samples or disease state samples with healthy controls to do comparitive experimental research.
What is the difference between a chi-square and t-distribution?
Chi-square is a distribution used to analyze the standard deviation of two samples. A t-distribution on the other hand, is used to compare the means of two samples.
What indication do the experimental result give regarding the purity of the samples used?
After a detailed chemical analysis the purity is correctly evaluated.
