Flashcards in Preliminaries Deck (6)
Define a p-value
A p-value is defined as the probability that you observe a test statistic as extreme (or more extreme) than the one you observed, given that the null hypothesis is true.
Describe a one-sample t test
There is a single sample and we want to test whether or not the population mean µ = some specified number k
Describe a two-sample t test
There are two samples from independent populations. We are testing whether or not they have the same population mean
State the assumption necessary for a two-sample t test
We assume the two samples come from normal distributions, have the same variance and all observations are independent.
State the assumption necessary for a one-sample t test
We assume the sample comes from a normal distribution and all observations are independent