StatCrunch Instructions: Hypothesis Testing for the Population Proportion p

Here is how you conduct the z-test for the population proportion (p) in StatCrunch.

There are two ways to perform the test, depending on whether you have summarized values or the raw data.

If the data are summarized, as they are in our case (out of a random sample of 316 airplanes, 40 were found to have contaminated water), then follow the steps below.

If you have raw data which consists of outcomes of individual trials, then follow the steps below.