Unit 5: inference and explanation stage
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In the Description stage, what is the dif between using a population vs using a sample?
- -usually too expensive
- -usually takes too long
- -usually bigger than needed
- -usually contains error
- -can be affordable
- -can take little time
- -can be just the right size
What are the 3 steps of the Central limit theory?
1- theoretically, a large sample of any descriptive statistic will be normally distributed.
2- theoretically, the mean of this distribution is the population descriptive statistic
3- if a sample descriptive statistic is close to the mean of this theoretical distribution, there is a good chance it is the population descriptive statistic.
What is statistical significance?
The amount of risk a researcher takes when deciding to accept or reject the null hypothesis
The probability that a researcher will reject the null hypothesis when it is actually true.
- significance level: p< .05
- p = probabilitiy
What would you like to do?
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