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How to calculate frequency - Office Equipment & Supplies

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What is the cumulative frequency of 1, 3, 1, 3, 3, 1, 4, 2, 1, 1

Posted on Feb 02, 2014


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How do I calculate wavelength given that the frequency of radiation is 5.10×10 to the -7?

First of all you need a scientific calculator, one with sin cos, tan, log etc. If you do have one, look for a key marked EE (Texas Instruments) or x10^x (Casio) or EXP (Casio, Sharp, Canon).
To enter 5.10*10^(-7) ,
type in
5.10[EXP] (-)7 then ?nter, Exe, or =.

Sep 30, 2015 | Office Equipment & Supplies

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What is a relative frequency table

It is a frequency table where the entries are the relative frequencies
relative frequency= (frequency/sum of all frequencies). The frequency can be expressed as a decimal number or a percentage. In that last case, the total of all frequencies will be approximately 100% (due to rounding errors).

May 12, 2014 | Texas Instruments TI-83 Plus Calculator

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Calculate the speed of the wave that has a frequency of 3 GHz and a wavelength of 4mm

For a plane wave in a homogeneous medium, the phase velocity of the wave is related to the frequency and the wavelength by the relation
velocity = wave_length*frequency
In this case
velocity (in m/s)=(4*10^-3 m )*(3*10^9 s^-1)=12*10^(9-3)=12*10^6
Thus velocity=1.2*10^7 m/s

Nov 28, 2013 | Office Equipment & Supplies

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Do I need to convert the unit of frequency if it is in GHz to calculate wave speed

To avoid mistakes due to faulty conversions, you must use SI units.
4 mm =4*10^-3 m
3 GHz=3* 10^9 Hz=3* 10^9 (s^-1)
Your result will be in m/s

Nov 28, 2013 | Office Equipment & Supplies

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How do I figure relative frequency

In the context of statistics the relative frequency of a data item (for ungrouped data) or a class (for grouped data) is equal to the ratio of the frequency of the data item or class divided by the sum of frequencies of all the data items or classes multiplied by 100%.
If you want the probability not the relative frequency, do not multiply the ratio by 100%.

Example: In a sample with N data items, a particular items occurs n times. Its relative frequency is equal to (n/N)x100%

Jun 01, 2011 | Texas Instruments TI-83 Plus Calculator

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How do you turn frequency on when in the stats table mode on a casio fx-9750gii?

There is no such thing as turning the frequency on on the Casio calculators. Just enter your data in lists. Choose one List where you put the frequency information. When you want to GRAPH or perform CALCulations you have a TAB labeled SET corresponding to key F6:SET. When you press F6, a new screen open where you assign the list to the variables.
Here are a few screen captures to help you.


Press F2:CALC (or F1 Graph). The Tab SET appears at the bottom of screen


Press F6:SET
Higlight the line 1-Var Freq (or 2-Var Freq). The bottom of screen shows F1:1 and F2:LIST. If frequencies are not equal to 1, press F2:LIST to assign the frequency list. I entered 2.


List2 is now the frequency list.

Press EXE to perform stats.


See that n=19.

May 19, 2011 | Casio FX9750GII Graphic Calculator

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I entered and calculated data in L1 now when I try to graph the data i get an err: invalid dim Here are the steps that I took: 2nd Stats Plots enter Plot1 On Type: Box Plot XList: L1 Freq:...

If you have a frequency list it must be entered in a statistical list, L2, L3, ...or L6.
If the frequency of all elements is 1 you do not need to enter the frequency in a list. When you go to draw the box plot, the frequency will be set to 1.


Sep 10, 2010 | Texas Instruments TI-84 Plus Calculator

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How do you enter frequencies for finding standard deviation? For example, Frequency=50, total of X or raw scores = 366.5. Summation of X squared =2836.39. What is standard deviation? How do you enter the...

I am afraid I do not understand. The frequency of a PARTICULAR score is the number of times that particular value occurs in the data. It is not the number of data.
Ex: the data are:
4, 6, 5, 4, 4, 8, 9, 3, 3, 6, 7
Frequency of (3) =2
Frequency of (4)= 3
Frequency of (5) =1
Frequency of (6)= 2
Frequency of (7)=1
Frequency of (8)=1
Frequency of (9)=1

Number of data =11 (n=11)

You compute the mean M
M= (2x3 + 3x4 +1x5 +2x6+1x7+1x8+1x9) /11 =5.363636..
As you can see, if a term is not repeated it is multiplied by 1 (its frequency is one). Value 3 occurs twice (hence 2x3); value 4 occurs 3 times (3x4), etc.

To calculate by hand the sum of squares
3: (3-5.3636)^2 + (3-5.3636)^2 .................... = 2x(3-5.3636)^2
4: (4-5.3636)^2 + (4-5.3636)^2 +(4-5.3636)^2 = 3x(4-5.3636)^2
5: (5-5.3636)^2 ...................................... .= 1x(5-5.3636)^2
6: (6-5.3636)^2 +(6-5.3636)^2......................= 2x(6-5.3636)^2
7: (7-5.3636)^2.......................................... .=1x(7-5.3636)^2
8: (8-5.3636)^2......................................... ..=1x(8-5.3636)^2
: (9-5.3636)^2......................................... ..=1x(9-5.3636)^2
If I have not made a mistake the sum of squares is 40.5454

Standard Deviation
The standard formula above gives s= square root (40.5454/10) =2.01
Population Standard Deviation
The population Standard deviation above is S= square root (40.5454/11) =1.9198

So if you perform the calculation with the calculator the only times you need to enter the frequency is for repeated terms. When you have to enter 6 above, its frequency is 2 you proceed as follows
6 [2nd][FRQ] 2 [Sigma+]

Once you entered the raw scores, the calculator does the rest.
Hope it helps.

Nov 06, 2009 | Texas Instruments TI-30XA Calculator

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Standard deviation

Here goes if you still need this...

STAT, EDIT, put information into L1 if only one variable stats, but put info into L1 and L2 if it is frequency table stats.

Then choose Stat, over to CALC, 1, enter...if 1 variable stats then press enter again. If frequency table stats, then choose STAT, over to CALC, 1, 2nd, 1 [L!], 2nd, 2 [L2], enter.

Oct 15, 2007 | Texas Instruments TI-84 Plus Calculator

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