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Q. Mean and Standard Deviation?
Ans.
The normal distribution is totally described if we know the average and standard deviation.
- the population mean of the distribution. Remember: this occurs at the peak of the distribution
- the population standard deviation of the distribution
Properties of Normal Distributions
The curve is symmetric about the mean, .The total area under the curve is 1.The mean, median and mode are equal. About 68% of the area is within 1 standard deviation ( ) of the mean. About 95% of the area is within 2 standard deviations ( ) of the mean.About 99.8% of the area is within 3 standard deviations ( ) of the mean.
volume=(1/3)(pi)(radius of base)2(height) curved surface area=(pi)(r)(l), r is radius of base and l is length of straight line connecting apex of cone with point on edge of base
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If p,q,r are roots of x^3-3x^2+4x-7=0 (p+2)(q+2)(r+2)=
-3+4 #Minimum 100 words accepted#
Combined Mean And Standard Deviation Occasionally we may need to combine 2 or more samples say A and B. Therefore it is essential to identify the new mean and the new standard
Give a Definition of Perimeter and Area? Perimeter is the distance around a flat (2-dimensional) shape. Area is the amount of space taken up by a flat (2-dimensional) shape. is
Functional and variations.Block III, Consider the functional S[y]=?_1^2 v(x^2+y'')dx , y(1)=0,y(2)=B Show that if ?=S[y+eg]-S[y], then to second order in e, ?=1/2 e?_1^2¦?g^'
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3 1/2 x 1 4/7 x 1 1/3
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