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Mean and covariance matrix calculator

Covariance is a measure of the covariance of two variables (X and Y). The calculator calculates the average for the sample and the covariance between variables. Sets of X and Y must be the same number.      


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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.              
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Conversion between number bases

Converter allows you to convert numbers between number bases - binary (binary), trójkowym, czwórkowym, Friday, szóstkowym, siódemkowym, octal (octal), dziewiątkowym, decimal (decymalnym) jedenastkowym, dwunastkowym, trzynastkowym, czternastkowym, piętnastkowym, hexadecimal (hex). Typed characters that are not numbers and the letters A, B, C, D, E, F are ignored.      
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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Ceiling oxygen uptake (VO2 max)

Calculator to the data calculated threshold of human breathing, the oxygen absorption by the body. This is one of the basic indicators of human performance. http://pl.wikipedia.org/wiki/Pu% C5% 82ap_tlenowy                      
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Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description      
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Calculator VAT refund for building materials

The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.                    
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Cost of online advertising

Calculator based on the entered values ​​to calculate the total cost, the cost for 1,000 impressions or views of online advertising.      
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Calculator global automotive in Poland

The calculator calculates the amount of the lump sum if you use a car for business use of vehicles that are not owned by the employer.