# Quantum and Survey Reporter t-Test of a Proportion

From Q

Where is the observed proportion and is the expected proportion and is the effective sample size, the test statistic is:

where if and NaN otherwise, and is Extra deff.

Note that if wishing to replicate results from IBM SPSS Data Collection products (including Survey Reporter and Quantum) additional settings need to be modified (see How to Replicate Survey Reporter Significance Tests).