Questions tagged [statistics]
The statistics tag has no usage guidance.
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Lies, Damned Lies, and Statistics [closed]
I am measuring time of flight of an acoustic pulse over an arbitrary path length. How can I determine the statistical resolution of the device?
So, I collect a load of readings over a path length of (...
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UNI-T UT181A question: what is confidence interval used in the datasheet?
So the question is: https://www.batronix.com/pdf/uni-t/UT181A-Manual-English.pdf
The manual has
So if you are measuring perfect 50 Hz source you have resolution 0.001 Hz the values are in interval ...
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Mass paralled resistors for better tolerance [duplicate]
I hope this doesn't get people's eye rolling as a very rudimentary question...
Here goes. I need a very, very precise resistor divider, say a 1/11 ratio. It doesn't really matter the ratio chosen. ...
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How can I correlate a RSSI value to a distance measurement more efficiently?
I want to develop a trilateration algorithm using 3 fixed advertising beacons in different parts of a room and a mobile receiver which continuously gets the RSSI values of the 3 fixed beacons and ...
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Tolerance Stack Up Distribution
Suppose I've got a 2V source with 2% accuracy that I want to divide down to 1V using 5% resistors. One can easily see with Monte Carlo analysis that the worst case output voltage deviation is 7%
I'd ...
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What is the statistical accuracy of a Reference Voltage based current source?
I would like to make a current source from a reference voltage chip (REF102).
OPA277 is used as a buffer to pin the voltage at pin 4 to the bottom of the current setting resistor R.
Hypothetically, if ...
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Number of data points needed for INL DNL estimation
In this article where ADC of pico pi is characterized, I found a part that I have never encountered in my study of mixed signals design:
I don't understand how we number of data points needed is ...
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How to monitor Ethernet packet loss real time on different connections?
For an embedded application we have a network with star topology, where we want to determine if there is packet loss for the different point-to-point (SMAC => DMAC) connections.
We consider ...
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Estimating shot noise - what's the origin?
If I have some photon detector, say a CCD, how do I estimate the error introduced by shot noise correctly? Typically, sources found on the internet say that the shot noise is the square root of the ...
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What is the physical significance of skewness and kurtosis of an eletrical signal?
I understood the mathematical meanings of the skewness and kurtosis. But when we calculate these quantities for a signal (say an electrical voltage signal), what physical meaning do they convey?
For e....
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Is measurement uncertainty 2 times standard deviation or 2 times standard error?
Textbooks and online sources often say the industry standard for uncertainty is given at a confidence interval of 95 %. This means out of 100 measurements, 95 would achieve the specified value and ...
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Suspicious definition of erlang distribution in Verilog-2005 spec
The $dist_erlang function in Verilog-2005 takes an argument called mean. Some information about the ...
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measurement errors: add up or cancel out?
Take an accelerometer, or a hall sensor, or a thermometer, or any sensor. It will have an accuracy, which means the readings will contain some error of this sort.
My guess is that by taking a big ...
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Why are different RMS noise sources added in this way?
I'm wondering why noise sources are added such a way their RMS values are added in square root of sum of squares fashion.
For instance if the RMS noise values from three sources are X,Y and Z, then ...
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Difficulty of implementation of this Rayleigh variate generator on simpler FPGA
For a university module we have been tasked with a 'research project' whereby we need to implement an FPGA non-uniform variate generator. I've identified one possible choice for the specific ...
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