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To decide whether observed differences between samples reflect actual differences between?
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What conditions are necessary in order to use a test to test the differences between two population means?
The samples must be randomly selected, independent, and normally distributed. The following are necessary to use a t-test for small independent samples. 1. The samples must be randomly selected. 2. The samples must be independent. 3. Each population must have a normal distribution.
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.
Do i say can i have samples about them or samples of them?
samples of them
What is sampling and holding time?
sampling time is the number of samples per second taken from a continuous signal to make it discrete and holding time is the time between two samples..
What is success independent samples design?
different samples of respondents from the population complete the survey over a time period
What is the difference between control samples and test experimental samples?
Control samples are used as a baseline reference to compare with the experimental samples, which are subjected to a specific treatment or condition. Control samples help to account for variability and ensure that any observed changes in the experimental samples are due to the treatment being tested. Experimental samples are used to investigate the impact of a particular variable or treatment on the system being studied.
Were the items you observed all made of compounds Or did you observe some element samples too?
I don't know what you observed, but I observed everything - elements and compounds and even some atoms!
How are restriction enzymes used to look for differences between DNA samples?
Restriction enzymes are used to cut DNA at specific recognition sites. By digesting DNA samples with these enzymes and then analyzing the resulting fragments using gel electrophoresis, researchers can look for differences in the fragment patterns between samples. Variations in fragment sizes indicate differences in the DNA sequences, which can be used to identify polymorphisms or mutations.
What conditions are necessary in order to use a test to test the differences between two population means?
The samples must be randomly selected, independent, and normally distributed. The following are necessary to use a t-test for small independent samples. 1. The samples must be randomly selected. 2. The samples must be independent. 3. Each population must have a normal distribution.
What conditions are necessary in order to use a t-test to test the differences between two population means?
The samples must be randomly selected, independent, and normally distributed. The following are necessary to use a t-test for small independent samples. 1. The samples must be randomly selected. 2. The samples must be independent. 3. Each population must have a normal distribution.
Why do polls have different outcomes?
Because they are based on samples and outcomes vary between different samples.
Should density for aluminum be the same for all aluminum samples?
No, density can vary slightly between different samples of aluminum due to factors like impurities or differences in processing. Generally, the density of aluminum is around 2.7 g/cm3, but small variations are possible.
The density of an substance varies with samples of that substance?
Yes, the density of a substance can vary depending on factors such as temperature, pressure, and the purity of the material. Small differences in the arrangement of molecules or the presence of impurities can lead to variations in density between samples of the same substance.
When testing for differences between two means the sample population are?
You are testing the difference between two means of independent sample and the population variance are not known. from those population you take two samples of two different size n1and n2. what degrees of freedom is appropriate to consider in this case
Is western blot quantitative method?
Western blot can be semi-quantitative. This means that you cannot determine absolute protein levels, but you can detect differences between groups. For example, if you have 4 different samples, a western blot will be able to tell you which samples have the most of any specific cellular protein. Quantitation is usually perfomed using "densitometry software" such as NIH ImageJ.
What did scientists learn from lunar samples brought back by Apollo astronaunts?
Scientists learned valuable information about the Moon's composition, geology, and history from the lunar samples brought back by Apollo astronauts. The samples provided insights into the Moon's formation, its volcanic history, and the impact of meteorite bombardment. Additionally, they helped scientists understand the similarities and differences between the Moon and Earth.
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.
