Averaging output over one second while taking a 5Hz sample

Aloha Everyone,
I'm a engineering student tasked with understanding how to use SignalExpress2013 with a USB-6341 device. This is my situation. I have an anemometer that feeds a voltage to the USB device betwee 0-4V. I am taking this data at 5Hz. I need to then have this data averaged to 1Hz, i.e. take the average of every 5 values and the result is the data for that 1 second in time. Therefore, on the time averaging step settings I chose the following:
Input signal: ai0
Weighting mode: linear Block avg.
Number of avg.: 5
However I don't understand how to interpret the data below. Can someone please explain how SignalExpress arrives with the values in the "time_avg_signal.txt" file?
Attachments:
Voltage.txt ‏1 KB
time_avg_signal.txt ‏1 KB

Sorry, the original files were the wrong ones. I have attached a new set. This is what I need:
Given these values with dt = 0.2 seconds (these are the first 10 in the VoltageNew.txt set): -0.5991051, -0.6234424, -0.6560018, -0.6711304, -0.6767214, -0.6734326, -0.6661971, -0.6665260, 8.590291, 7.792382
I need the average over a second like this (dt= 1 second): -0.50994, 2.875303
In other words, average the first 5 values, then average the next 5 values, rinse and repeat.
I felt that I had the settings properly inputted as shown in my previous message, but instead I'm getting what's shown in the "time_avg_signalNew.txt" file. My questions are:
1) What algorithm is SE using to come up with new numbers such as the values listed in the 2nd quintuple-set of values?
2) is there a way to format these files to have the timestamps running down the spreadsheet instead of just giving a start time and a dt value?
Attachments:
time_avg_signalNew.txt ‏3 KB
VoltageNew.txt ‏2 KB

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Averaging output over one second while taking a 5Hz sample

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