what is frequency deviation?
550148
In telecommunication, the term frequency deviation has the following meanings:\n\nThe amount by which a frequency differs from a prescribed value, such as the amount an oscillator frequency drifts from its nominal frequency.\n\nIn frequency modulation, the absolute difference between the maximum permissible instantaneous frequency of the modulated wave or the minimum permissible instantaneous frequency of the modulated wave and the carrier frequency. Usually written Δf.\n\nIn frequency modulation, the maximum absolute difference, during a specified period, between the instantaneous frequency of the modulated wave and the carrier frequency.
935234
"In probability and statistics, the standard deviation of a probability distribution, random variable, or population or multiset of values is defined as the square root of the variance.\n\nThe standard deviation is measured in the same units as the values of the population. For a population of distances in meters, the standard deviation is also measured in meters, whereas the variance is measured in square meters."\n\n\nIn essence, standard deviation is used for categorizing groups.\nFor example, the average IQ is 100, the standard deviation to the left would be 85, and deviation to the right would be 115. Two left standard deviations would be 60, two right standard deviations would be 130.\nSame applies to SAT scores, statistics, polls, etc.
315881
The Law of Statistical Regularity:\n\nhttp://www.tardis.ed.ac.uk/~kate/qmcweb/s9.htm\n\nAn example of the frequency polygon:\n\nhttp://davidmlane.com/hyperstat/A49236.html\n\nAn example of the reducing balance method:\n\nhttp://www.tutor2u.net/business/accounts/assets_fixedassets_depreciation_rbexample.asp\n\nBut these answers are not going to help you understand statistics and statistical interpretation.  Statistics is not like learning History, where the right answer is going to be "1746" or "The Diet of Worms", you need to understand what a frequency polygon is showing you about a set of data.\n\nMaybe you need an on-line tutor.  You can find them on google, too.
693668
Fourier analysis is a mathematical technique that has application in a lot of fields.  It's often used for retrieving meaningful data from statistical "noise", for instance..  it also shows up in antenna and filter design, signal analysis, and many other areas.
121079
Variance is the square of the standard deviation......usually given the symbol (small case) sigma.\n\nVariance ==> σ^2\n\nFind that symbol. It's common and should be readily seen on the keypad.
605367
It's a measure of central tendency that is acheived by dividing the sum of all values (sample data) by total number of occurences (frequency).
332290
Generally it is the standard deviation, or range of typical answers.  The mean usually is the center of the bars, but not always.
869354
standard deviation is one of measure of variability use in statistics which has the same unit as the given data and is equivalent ot the square root of the variance.\n\nIt measures how all the data varies. It indicates how the data in a distribution scatter or spread.\n\nThe lower the standard deviation, the closer are all the data around the mean.\nThat is, the data are not scattered and they are less heterogenuous, less variable.\n\nThe greater its value, the more the spreadness of the data around the mean.\n\nFor example,\nGiven:\nA: 45,46,40,43,48,46\nB:10,45,28,100,158,468\n\nThe standard deviation of the data A is 2.804757863\nThe standard deviation of the data B is 171.9400089\n\n]since the statndard deviation of the data A is less that in B,\nthe data in A are closer to each other, compare to the data B.
327228
Sum of\n(freq.observed - freq.expected)^2 / freq.expected\n\nWhere freq.expected=\nRowTotalxColumnTotal / Total Sample Size.\n\nThe chisq value you get is checked against the table of critical values where df=(r-1)(c-1). \n\nr=number of rows\nc=number of columns
193108
what is the frequency kenneth
161214
. The \n60Hz standard adopted in the US comes from the use of the periodic voltage \nas a timing mechanism for electric clocks (60 minutes in an hour, 60 \nseconds in a minute, so 60 cycles in a second).
826326
A greek letter..... it can mean population standard deviation. Not sure of other meanings.
149529
I think this link will help you...\n\nhttp://www.freedict.com/onldict/fre.html
878393
Vibration refers to mechanical motion. The motion may be:\n\nPeriodic (in the form of oscillations) \nAperiodic (in the form of random noise) \nA mixture of the two \nVibration is occasionally desirable. For example the motion of a tuning fork, the reed in a woodwind instrument or harmonica, or the cone of a loudspeaker is desirable vibration, necessary for the correct functioning of the various devices.\nThe vibrating alert in a cell phone or the much larger vibrations of a vibratory compactor are additional examples where the vibration is desired.\n\nVibrating Frequency is the measurement of the number of times that a repeated event occurs per unit of time. It is also defined as the rate of change of phase of a sinusoidal waveform created by vibration.\n\nUnit of frequency of vibration - the number of cycles per second\n=second^(-1)\n=hertz or kilo hertz.\n\n(In SI units, the result is measured in hertz (Hz), named after the German physicist Heinrich Rudolf Hertz. 1 Hz means that an event repeats once per second, 2 Hz is twice per second, and so on. This unit was originally called a cycle per second (cps), which is still used sometimes. Other units that are used to measure frequency include revolutions per minute (rpm) and radians per second (rad/s). Heart rate and musical tempo are measured in beats per minute (BPM).\n\nAn alternative method to calculate frequency is to measure the time between two consecutive occurrences of the event (the period) and then compute the frequency f as the reciprocal of this time.\n\nFrequency of waves:\nFrequency has an inverse relationship to the concept of wavelength. The frequency f is equal to the speed v of the wave divided by the wavelength λ (lambda) of the wave
274177
The volume change is only a matter of distance from the horn to you.\n\n As a sound emitter approaches you, the frequency change, doppler effect, is caused by the shortening of the wave length as the back end of the wave is "compressed" against the front of the wave . Shortened wave length equates to higher frequency for approaching sounders. \n\nAs an emitter moves away from you, the back end of the wave is stretched out away from the front end of the wave, the wave length increases, and the frequency decreases.
742865
It sets an upper limit to the frequency spectrum that can be controlled (Nyquist aliasing effect)\n\nIt affects the computational burden of the controller\n\nIt affects the hardware performance requirements of the sampling system\n\nThere are tradeoffs that can be made between data acquisition accuracy and sampling rate, using digital filtering techniques
1041802
Could not find a word to fit the gaps however found this website which might help.\n\nhttp://www.engr.mun.ca/~ggeorge/astron/blackholes.html\n\nP.S. The Doppler effect actually affects frequency so can be observed in sound, LIGHT and electromagnetic radiation.