Population & Sampling
The goal of this presentation is to learn about sampling methods and determine the population sample representativeness, distribution, size and probability of sample mean to fall within the population interval.
Populations are used when your research question requires, or when you have access to, data from every member of the population. Usually, it is only straightforward to collect data from a whole population when it is small, accessible and cooperative. A population is the entire group that you want to draw conclusions about. A sample is the specific group that you will collect data from. The size of the sample is always less than the total size of the population. In research, a population doesn’t always refer to people. It can mean a group containing elements of anything you want to study, such as objects, events, organizations, countries, species, organisms, etc.
1:02 Population and Samples
2:06 Sampling Methods
4:30 Sample means for Representativeness
6:25 Sample Size and Error
12:39 Standard Deviation
16:56 Confindence Interval
19:15 t-distriution or t-test
20:23 Takeaway
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