Hypothesis Testing
A statement about the population that we wish to test and states that there has been no change, or that an effect is zero.
What is the null hypothesis?
The number of standard deviations a particular score is away from the mean.
What is a z score?
Correlation and regression are inferential statistics used to analyze these types of variables.
What are numerical / continuous / ratio variables?
Assumption that data in each population being sampled is normally distributed.
What is normality?
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Experimental decision that is made when there is a change in the hypothesized direction.
What is to reject the null?
The mean of the z-distribution
What is 0?
The common alpha level used.
What is 0.05?
Assumption that all population members had an equal likelihood of being chosen to participate in the study (although rarely met in practice).
What is random sampling?
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What is January 19th, 2025?
This type of test includes values that differ in one direction from the null hypothesis value. For example, H1: m > 50.
What is a one-tailed/directional test?
When your |tobt| > |tcrit|, you would make this statistical decision (related to your non-directional hypothesis).
What is Reject H0?
A correlation becomes stronger as r gets closer to these two values.
What are 1 and -1?
Assumption that one participant's responses on the DV does NOT influence other participants' responses on the DV.
What is independence (of observations)?
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What are "Moana" and "Mufasa"?
This results from a decision to reject H0, when in reality H0 TRUE.
What is a Type I error?
The difference between z-tests and one-sample t-tests, is that we're missing this piece of information.
What is the standard deviation of the population (sigma)?
The correlation coefficient is used to measure the ______ and ______ of the linear relationship between two factors.
What are the strength and direction?
Assumption that the standard deviation of one group sampled is not different than the standard deviation of other group sampled.
What is equal variances?
Official term to describe the standard deviation of the sampling distribution.
What is the standard error of the mean?
Hypothesis testing prioritizes preventing this type of error.
What is a Type I Error?
Shorthand (in symbols) for one-tailed null hypothesis when the alternative hypothesis predicts that the mean is less than 20.
What is H0: mu >/= 20 ?
Regression differs from correlation in that it has this goal in mind.
What is prediction?
As **___ increases/decreases**, parametric statistics become more robust against violations of assumptions.
What is "as N increases"?
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Who is Rob Rausch?