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Will two samples from the same population will have different t statistics even if they are the same size and have the same mean?
False, the probability cannot be negative! T/F: Two samples probably will have different means even if they are both the same size and they are both selected from the same population. The distribution of sample means based on samples of n=16 selected from this population will have an expected value of 80/4=20.
What are the two types of samples taken from a population?
There are several different sampling techniques available, and they can be subdivided into two groups: probability sampling and non-probability sampling. In non-probability (non-random) sampling, you do not start with a complete sampling frame, so some individuals have no chance of being selected.
When to use a sample from a comparison population?
For analysis, we have samples from each of the comparison populations, and if the sample variances are similar, then the assumption about variability in the populations is reasonable.
Can we use two sampling techniques in the same research?
The question was not about multistage sampling, or qualitative versus quantitative. There are two subpopulations for which the questioner, Asma, apparently wanted to obtain quantitative results. Cluster sampling for the rural subpopulation appears wise, as that may be more feasible.
How to compare two population proportions-Dummies?
In order to make this comparison, two independent (separate) random samples need to be selected, one from each population. The null hypothesis H 0 is that the two population proportions are the same; in other words, that their difference is equal to 0.
What causes a difference between two sample means?
An observed difference between two sample means depends on both the means and the sample standard deviations. Very different means can occur by chance if there is great variation among the individual samples. The test statistic will have to account for this fact.