Statistical method that uses sample data to evaluate a hypothesis about a population.
Hypothesis test
The _____ states that there is no change in the general population before and after an intervention.
null hypothesis
Also known as a one-tailed test, the statistical hypotheses specify either an increase or a decrease in the population mean.
directional hypothesis test
Measures the size of the mean difference in terms of the standard deviation
Cohen's d
General goal of a hypothesis test is to rule out...
chance/sampling error
The ____ states that there is a change in the general population following an intervention.
alternative hypothesis
Critical Region
Cohen's d =
mean difference over standard deviation
How many steps are there to Hypothesis test? Enumerate/identify them.
Four. (Proceed to enumerate them)
Forms a ratio comparing the obtained difference between the sample mean and the hypothesized population mean versus the amount of difference we would expect without standard error
test statistic
Different from one-tailed test, it requires a relatively large difference independent of direction.
Two-tailed test
Intended to provide a measurement of the absolute magnitude of a treatment effect, independent of the size of the sample(s) being used.
Effect size