Which of the following is a requirement for using the Z-test for differences of proportions?
A) common sample
B) degrees of freedom of at least 50
C) sample size greater than 30
D) ratio measurement of all variables

Question

Quizplus · Accepted Answer

The Z-test for differences of proportions requires a sample size greater than 30 in order to use the normal distribution. This is because the normal distribution can only be used for large sample sizes, otherwise the distribution may not be normal and the test results may not be accurate. The other options listed (A, B, and D) are not requirements for using the Z-test for differences of proportions.

Which of the Following Is a Requirement for Using the Z-Test