No.
If they are not matched pairs, it does not really matter. If the combined sample size is fixed (because of costs, say) then it is better to have a larger sample where more variability is expected.
· One-tailed test looks at the probability that the sample mean was either "greater than", or "less than or equal to" · Two-tailed test, sees if two means are different from each other (ie from different populations), or from the same population and tries to establish "equal to" or "not equal to
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Both are parametric test. The t-test uses a test statistic that is related to the sample mean(s) and is used to compare that with the mean of another sample or some population. The F-test uses a test statistic that is related to the sample variance and is used to compare that with the variance of another sample or some population. Both tests require identical independently distributed random variables. This ensures that the relevant test statistics are approximately normally distributed.
Presenter
If they are not matched pairs, it does not really matter. If the combined sample size is fixed (because of costs, say) then it is better to have a larger sample where more variability is expected.
The assumptions of a two-sample t-test are: Each sample come from a normally distributed population. Both populations have equal variances. The data are sampled independently from each population.
This test requires a blood sample. It is not necessary for the patient to be in a fasting (nothing to eat or drink) state before the test.
The GMAT test is necessary to get into certain graduate schools. Sample questions can be found online, there are websites such as Petersons which show some sample questions on their website. Alternatively, books of sample questions can be bought either from local bookstores, or online retailers such as Amazon.
to identify the blood type of the patient or the sample being tested
The sample size must be equal
Not necessary, even test can be performed on discreet samples. To establish relationship only father's and child sample required.
· One-tailed test looks at the probability that the sample mean was either "greater than", or "less than or equal to" · Two-tailed test, sees if two means are different from each other (ie from different populations), or from the same population and tries to establish "equal to" or "not equal to
The progesterone and testosterone tests require a blood sample; it is not necessary for the patient to restrict food or fluids before the test.
From a sample of urine.
The larger the sample size, the more accurate the test results.
A blood sample is a sample given for medical purposes as a blood test.