Showing posts with label standard deviation. Show all posts
Showing posts with label standard deviation. Show all posts

Wednesday, 25 April 2012

range

It is defined as it contains all data and it is also length of the smallest intervals. It is based on two observations that are poor and weak and it is calculated by subtracting the lowest to the highest sample which includes statistical dispersion. Range, is the simplest method of measuring the variability and it is used only for highest score minus the lowest score. Range is equal to or greater than standard deviation which comes under cbse syllabus for class 10.
In range the difference between highest and lowest scores is known as crude range. The smallest and greatest observation is called observed range. For example range can be present in entire row or column and multiple row, column.
Range Of Probability (introduction to probability worksheet), is defined as an event is impossible when its probability is zero and when event is there its probability is one. The value of probability is Pr (impossible event) = 0
The probability of event A is denoted by P(A) and it is range from 0 to 1.
The range of distribution and value of function is equal to zero and it is a random variable which is used to differentiate between maximum value and minimum value which is equal to zero.
The three kinds of averages are mean, median and mode. The median is the middle value in the numbers. For example find the mean, median mode and range of the following values:
3,5,8,6
Answer: (3+ 5+8+6)/ 4 = 22/4 = 5.5
The mean is 3.5
median is 8+6= 14/2= 7
mode= none
range = 5
The largest value is 8, the smallest is 3 and their difference is 5.
so, the range is 5.
The output value of a function is called range of a function.
Domain ->function->Range.
In the next session we will discuss about Predictions from data and You can visit our website for getting information about physics tutor .

Tuesday, 24 April 2012

standard deviation

standard deviation is defined for the given set of data in which data is spread or it is also called as data is distributed in the data set .It is defined for the distributed data set for defining the diversity of the set of data .standard deviation is the part of statistics in which we can understand that how data is deviated from its mean value or sometimes it will be denoted as the average value. You can also find the standard deviation for the given probability distribution.
According to definition of standard deviation which is given in cbse text books, it will used for finding the deviation of the data in the data set from the standard average value or mean value for that set of data .It will defined the dispersion of the data in form of variance that is sometimes called as the populated standard deviation .
sigma symbol (s) is used for specify the standard deviation and it is known as known as the standard deviation and there is one more way for defining the standard deviation that is square root of variance and it will be define as the (s 2) .
We can understand the standard deviation by specific expression that helps to understand the standard deviation very effectively:
If there in the data set a random variable (a) , for that mean value is define as m and it is denoted as in form of average or mean E | a | = m .
Where E denotes the average value of a .
so the formula for standard deviation is that is based on the mean value E is defined as
( s ) = √ E (a - m ) 2 .
Standard deviation is also expressed by formula of variance that is defined as square root of the variance and In the next session we will discuss about mode and you can also take chemistry tutoring from our website.