what is the measure of dispersion?
483947
In statistics, it's the degree of scatter of data.  In physics it's the separation of visible light into colors by refraction or diffraction.
646210
A measure of change in the universe.\n\nMake an observation or perform an experiment.  For example, pour water out of a glass.  The water is in the glass.  The water is out of the glass.  The water is on the floor.  What is the relationship of the observations you make?  That measure of change can be attributed to the passage of time.
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.
810641
Use Archimedes's buoyancy principal.  The weight outside represents the response of mass to the Earth's gravity.  The weight in water represents the displaced water's weight.  Use the ratio to get the answer.  HINT: if you convert to mass, the answer almost gives itself away.\nThe displaced water has a well known density.  That density will give the volume of the both the displaced water and the object displacing it.
983043
A=ebc\n\nWhere A is absorbance (no units, since A = log10 P0 / P )\n\ne is the molar absorbtivity with units of L mol-1 cm-1,\n\nb is the path length of the sample - that is, the path length of the cuvette in which the sample is contained. We will express this measurement in centimetres.cm\n\nc is the concentration of the compound in solution, expressed in mol L-1\n\nNow, you know why there is no unit for "A".
388597
KiloPascals\nInches of Mercury\nPounds per Square Inch\nAtmospheres\nMillibars\n\nAll of these are used as units to measure air pressure.\n\nStandard atmospheric pressure is usually measured as millibars. Like when you watch the Weather Channel...\n\n:)
341105
Density is mass divided by volume.  The mass of the piece of wood is very easy to measure.  The volume, however, may not be so easy.  Perhaps the easiest way to measure volume, especially if the wood is an odd shape, is to submerge it in water, and measure the amount of water which is displaced by the wood.
220310
The traditional method of measuring unsaturation is to measure the reaction between the substance and a solution of molecular bromine.  The Br2 adds across double bonds that are present and you can measure the change in color of the bromine solution.  \n\nA less toxic (but more explosive) alternative is to hydrogenate the substance with a known quantity of hydrogen gas and measure the change of pressure, volume, or mass to determine how much hydrogen has been incorporated.
1161756
It's been a while since I took Chem, but if I remember correctly you can measure the mass of a non uniform rigid body using displacement. For example, if you have a beaker filled with water fill to the 50ml level and you insert a non uniform object into the beaker the the water level will rise. This change in the water level will equal the volume of the non uniform object. Then you can use the equation p=m/v and solve for the mass assuming that you know the p the density.
1068254
This is Measured in MTBF or Mean Time Before Failiure. Noramlly if you know the manufacturer you can get information on that through thier website.
554074
From a data transmission standpoint, fiber optic performance is limited by attenuation and dispersion.  Attenuation is the loss of signal strength over distance; dispersion is the loss bandwidth due to the degradation of signal waveforms.
702508
In a transverse wave, the wavelength is the distance between the crests (or troughs) of the wave.\n\nThe frequency is the number of times a wave passes in a certain amount of time.
260932
it's a vector! measure of distance - magnitude, and the direction of the vector.
110762
mostly, PPM as in Parts Per Million\n\nThey measure the particles in the air that are known to be foul smelling, like sulfer
248784
Central Tendency is used in Statistics to analyze a set of numerical data.  The purpose of of central tendency is to "measure" where the "center" of the data is located. Think of this measurement as a number which can be representative of the whole data set.  The most used central tendency measurements are:\n  - Mean: numerical average of a data set\n  - Median: the piece of data located in the center of the data set after it has been ordered.\n  - Mode: the data element(s) in the set that repeats the most.  Note that the Mode can  be more than one number if it happens that more than one particular number repeats the same amount of times.\n\nNormally, when analyzing a set of numerical data, not only the central tendency measurements are analyzed, but also disperssion measurements are taken into account.  \n\nDisperssion reffers to how "spread" is the data.  The most common disperssion measurements are:\n  - Standard deviation:  measuring how spread is the data around the Mean.\n  - Range: measures the distance from the smallest to the highest number in the set.\n\nHope this helps.\nAlberto
546804
Diffusion Waves and their Uses \n\nDiffusion waves lack wave fronts, can't be beamed, and don't travel very far, yet they form the basis of several new and revolutionary measurement technologies. \n\nthis is the site Address \nhttp://www.aip.org/pt/vol-53/iss-8/p29.html\n\nyou  will get all the information you  need for your project  in this site
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).