Examlex
The table below shows the mean number of daily errors by air traffic controller trainees during the first two weeks on the job.We want to perform a paired t-test at = .05 to see if the mean daily errors decreased significantly. What would be the degrees of freedom for the appropriate test?
Power of the Test
The probability of correctly rejecting a false null hypothesis in a statistical test.
Random Sample
A selection of individuals or items from a larger population or set in such a way that each has an equal chance of being included, ensuring the sample's representativeness of the whole.
Normal Population
A population with a data distribution that follows a normal curve, characterized by the bell shape.
Significance Level
The probability of rejecting the null hypothesis when it is true, usually set as a benchmark for testing hypotheses in research.
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