From 0b2228b573dc53baaf76f9e17788efebb2463689 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Mon, 1 Dec 2025 17:41:34 +0000
Subject: README: Add FAQ about standardization.

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'README.md')

diff --git a/README.md b/README.md
index ba6ff54..260f3d3 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ pyhegp is a Python library and CLI utility implementing homomorphic encryption o
 - [How to use](#how-to-use)
   - [Simple data sharing](#simple-data-sharing)
   - [Joint/federated analysis with many data owners](#jointfederated-analysis-with-many-data-owners)
+- [Frequently asked questions (FAQ)](#frequently-asked-questions-faq)
 - [File formats](#file-formats)
 - [Run tests](#run-tests)
 - [License](#license)
@@ -93,6 +94,11 @@ pyhegp cat-phenotype -o complete-phenotype.tsv.hegp phenotype1.tsv.hegp phenotyp
 ```
 Note that all data sharing is carried out-of-band and is outside the scope of `pyhegp`.
 
+# Frequently asked questions (FAQ)
+## Does pyhegp standardize the data?
+
+For each SNP, `pyhegp` standardizes the genotype (so the mean is zero and the standard deviation is one) during encryption. `pyhegp` does NOT standardize the phenotype.
+
 # File formats
 
 See [File formats](doc/file-formats.md) for documentation of file formats used by pyhegp.
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