Leptokurtic-measure of central tendency, Mathematics

Leptokurtic

a) A frequency distribution which is lepkurtic has normally a higher peak than that of the general distribution. The coefficient of kurtosis while determined will be found to be more than 3. Hence frequency distributions along with a value of more than three are definitely leptokurtic

b) Several frequency distributions while plotted may produce a curve similar to that of the general distribution. That frequency distributions are referred to as mesokurtic. The degree of kurtosis is normally equal to 3

c) While the frequency curve contacted produces a peak which is lower than that of a common distribution while such a curve is said to be platykurtic. The coefficient of Leptokurtic is generally less than 3

- This is necessary to calculate the numerical measure of kurtosis. The generally used measure of kurtosis is the percentile coefficient of kurtosis. This coefficient is commonly determined by using the given equation

Percentile measure of kurtosis, K (Kappa) =1971_Leptokurtic-measure of central tendency.png

 

Illustration

Refer to the table above for loans to small business firms/units

Essential

Calculate the percentile coefficient of Kurtosis as

P90 =  (90/100)(n + 1) = 0.9 (610 + 1) 

= 0.9 (611)

= 549.9

The actual loan for a firm in this position

(549.9) = 80.5 + ((549.9 - 538)/40) x 5 = 81.99

P10 = (10/100) (n + 1) = 0.1 (611) = 61.1

The actual loan value given to the firm on this position is

50.5 +((61.1 - 32)/62) x 5 = 52.85

= 0.9 (611)

= 549.9

∴ percentile measure of kurtosis

K(Kappa) =       ½ {(Q3 - Q1)/(P90 - p10)}

 = ½  {(73.82 - 58.53)/(81.99 - 52.85)}

= 0.26

Because 0.26 < 3, it can be concluded that the frequency distribution exhibited by the distribution of loans is platykurtic

Kurtosis is measured also by moment statistics that utilize the exact value of each observation.

i.  M1 the first moment = M1 = (åX)/n = Mean M1 or M1

M2 =  (åX2)/n

M3 =  (åX3)/n

M4 =  (åX4)/n

3. M2 second moment about the mean M2 or f2

M2 = M2 - M12

4. M3 third moment about the mean M3 (a measure of the absolute skew ness)

M3 = M3 - 3M2M1 + 2M13

5. M4 fourth moment about the mean M4 (a measure of the absolute Kurtosis)

M4 = M4- 4M3M1 + 6M2M12 + 3M14

An alternative formula

1172_Leptokurtic.png

Posted Date: 2/18/2013 1:51:06 AM | Location : United States







Related Discussions:- Leptokurtic-measure of central tendency, Assignment Help, Ask Question on Leptokurtic-measure of central tendency, Get Answer, Expert's Help, Leptokurtic-measure of central tendency Discussions

Write discussion on Leptokurtic-measure of central tendency
Your posts are moderated
Related Questions
how to find periods in trigon ometry

Surface Area with Parametric Equations In this final section of looking at calculus applications with parametric equations we will take a look at determining the surface area o

who created math?


To understand the multiplication of binomials, we should know what is meant by Distributive Law of Multiplication. Suppose that we are to multiply (a + b) and m. We

Find x and y in each paarallelogram.

a) Complete the inventory record below for an FOQ of 100 units. b) Talk about weaknesses of MRP. List at least 3 and describe each in a sentence or two. Item: A

What are the other differences between learners that a teacher needs to keep in mind, while teaching?  Let us see an example in which a teacher took the pupil's background into acc

trigonometric ratios of sum and difference of two angles

A circle touches the sides of a quadrilateral ABCD at P, Q, R and S respectively. Show that the angles subtended at the centre by a pair of opposite sides are supplementary.