The help file associated with ACT should be able to give most of this information.
All results for the test are listed in the Application Center Test Results window. The most commonly used performance measurements are displayed to the right of the name:
Test Run Name: The display name for the report. Right-click the report to rename it or delete it from the project.
Date Started: The date and time the test run started.
Total Run Time: Test run duration, in seconds.
Total Iterations: The number of times the test looped through the test script during the test run.
Total Requests: Total number of requests sent during the test run.
Connections: The number of simultaneous browser connections property value at the time the test run occurred.
Avg Requests/sec: Average number of requests sent, per second. Value is calculated with data collected over a one-second time period.
Avg Time to First Byte (msecs): Average time between sending the request, and receiving the first part of the server response.
Avg Time to Last Byte (msecs): Average time between sending the request, and receiving the end of the server response.
HTTP Errors: Sum of all responses with result codes in the 400-499 and 500-599 ranges.
DNS Errors: Sum of all domain name system (DNS) errors.
Socket Errors: Sum of all socket connection errors.