Standard errors of the mean, Mathematics

Standard errors of the mean

The series of sample means x¯1, x¯2, x¯3 ........ is normally distributed or nearly so as according to the central limit theorem. This can be described by its mean and its standard deviation. Its standard deviation is termed as the standard error.

Standard error of the mean is =  S = s/√n

Note: the above formula is satisfactory for larger samples and a large population that is n > 30 and n > 5 percent of N.

- The word 'error' is in place of 'deviation' to emphasize that variation with sample means is because of sampling errors.

- The smaller the standard error the greater the precision of the sample value.

 

Posted Date: 2/18/2013 8:11:02 AM | Location : United States







Related Discussions:- Standard errors of the mean, Assignment Help, Ask Question on Standard errors of the mean, Get Answer, Expert's Help, Standard errors of the mean Discussions

Write discussion on Standard errors of the mean
Your posts are moderated
Related Questions
We will firstly notice the undamped case. The differential equation under this case is, mu'' + ku  = F(t) It is just a non-homogeneous differential equation and we identify h

Three mixtures were prepared with very narrow molar mass distribution polyisoprenesamples with molar masses of 8000, 25,000, and 100,000 as indicated below. (a) Equal numbers of

The function A(t) = 5(0.7)^t was used to define the amount A in milliliters of a drug in the bloodstream t hours after the drug was ingested. Determine algebraically the time it wi

Graph f ( x ) = |x| Solution There actually isn't much to in this problem outside of reminding ourselves of what absolute value is. Remember again that the absolute value f


A jet flew at an average speed of 480mph from Point X to Point Y. Because of head winds, the jet averaged only 440mph on the return trip, and the return trip took 25 minutes longer

On your geometry test you have two triangles: ?ABC and ?MNO. You are told that ?A ? ? M and that ?B ? ? N. Which statement is also true?

Solve the inequation: |x|

1. Consider the model Y t = β 0 + β 1 X t + ε t , where t = 1,..., n.  If the errors ε t are not correlated, then the OLS estimates of  β 0   and β

Example :  Determine the equation of the line which passes through the point (8, 2) and is, parallel to the line given by 10 y+ 3x = -2 Solution In both of parts we are goi