---
title: "Time To First Byte (TTFB) and Send Metrics only display Average statistical value"
slug: "time-to-first-byte-ttfb-and-send-metrics-only-display-average-statistical-value"
updated: 2023-01-06T15:48:57Z
published: 2023-01-06T15:48:57Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.catchpoint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Time To First Byte (TTFB) and Send Metrics only display Average statistical value

Changing the **Statistical Value** in from the drop-down in Explorer does not change the values for **Time To First Byte**. It still continues to show the Average value for Time To First Byte (and **Send**) irrespective of whether you choose Median or Mean or any other statistical value.

**Reason:** When calculating performance metrics, Time To First Byte is calculated as a composite metric. In other words, it's the sum of **DNS + Connect + SSL + Send + Wait**. Therefore, when looking at a performance table, while the other raw metrics have different statistical values corresponding to Median, Average, 95th Percentile, etc., for Time To First Byte (and Send, among others) which are composite metrics, the Catchpoint portal will only display the Average value.

Composite metrics do not have a statistical value attached to them, so unlike raw metrics, the portal will only display the average values alone.

![](https://cdn.document360.io/cb4af8f9-6751-4fd2-b39c-07aae832badb/Images/Documentation/205854043-ttfb.jpg)