relative frequency mean

Let u be the frequency of a wave. That is, the number of vibrations completed by a particle in one second is u . Time taken to complete u vibrations = 1 second. . But time taken to complete one vibration is defined as the time period of the wa..

Mean is the arithmetic average. To find mean of ungrouped data and it is obtained by adding the raw scores and dividing the sum by the number of items. There are three methods to find mean for a frequency distribution. (i) Direct method, (ii..

The number which tells us how many times a particular data appears is called the frequency. For example, 2 marks have been scored by five students which means marks 2 occurs five times. Therefore, the frequency of score 2 is five. Similarly, the frequency..

The three molecular speeds are expressed as ..

(i) Various electrical machines and noises cause amplitude disturbance in the transmission of amplitude-modulated wave. This makes the reception noisy. So, there is a need for different type of modulation, which can reduce the noise factor. Frequency modulation (FM) was proposed as a ..

The mean deviation of a statistical data is defined as the arithmetic mean of the numerical values of the deviations of items from some average value. Mean deviation is also known as average deviation . The mean deviation is generally denoted by M.D. Formula ..

The ratio of the maximum error to time value of the measured quantity. Where arithmetic mean is taken as time value..

In order to determine the density of a substance or an object, we find out the mass and volume of the substance and use the relation..

The relative tendency of acids to transfer a proton to a common base, generally water is expressed as the relative strength of bronsted acids. For example, HCl has a higher tendency to transfer a proton to H 2 O than CH 3 COOH. This means HCl is a stronger acid than a..

: If aRb then bRa. Let a be brother of b then b may not be brother of a, because b may be sister of a. False. Note:- When any one property is not satisfied we say that the relation is not an equivalence relation. Example 11:- Let A = {members of a family}. The relation..