Statistics Homework Help

Statistics Homework Help Statistics Assignment Help

Economicshelpdesk Mark Austin

Contact Us: Web: http://economicshelpdesk.com/ Email: info@economicshelpdesk.com Twitter: https://twitter.com/econ_helpdesk Facebook: https://www.facebook.com/economicshelpdesk Blog:

http://economicshelpdesk.blogspot.com

Tel: +44-793-744-3379

About Statistics: The statistics assignment help of the online statistics tutors can be availed by the students on our website very conveniently. Most of the services of online tutors in statistics nowadays are no longer free. But the prices we offer are very affordable and the students will surely like the benefits of their helpful guides and solutions while having a tutorial lesson in Statistics for their assignments. All our statistics experts are capable of handling different kinds of statistics assignments that are present in the course curriculum of university and colleges in the present time.

Statistics Assignment Sample Illustrations and Solutions:

Illustration 1. Shift the trend origin from 2001 to 2004 in the straight line trend equation, Yc = 25 + 2x, given that the time unit = 1 year. Solution Here, the trend origin is to be shifted forward by 3 years i.e. from 2001 to 2004. Thus k =3. By the formula of trend shifting se l have, Yc = a + b (X + K) Substituting the respective values in the above we get, Yc = 25 + 2 (X + 3) = 25 + 2X + 6 = 31 + 2X Thus, the shifted equation is given by Yc = 31 + 2X Where, origin of X = 2004, and X unit = 1 year. Note. From the above shifted equation, it must be note4d that the value of a only6 has been changed from 25 to 31, whereas the value of b remains the same 2.

Illustration 2 The trend equation for a time series is fitted as Yc = 60 + 1.5X shift the trend origin from 2004 ti 1998, given that the time unit is 1 year. Solution Here, the trend origin is to be shifte4d back by 5 years i.e. from 2004 to 1999. Thus k = -5 By the formula of trend shifting we have, Yc = a + b (X –K) = 60 + 1.5 (X – 5) = 60 + 1.5X – 7.5 = Yc = 52.5 + 1.5X, where the origin of X = 1999.

Illustration 3. Shift the trend origin from 2002 to 2004 in the following trend equation: Yc = 20.3 + 0.4X + 0.5X2 Given that the time out unit = 1 Year. Solution Here, the trend origin is to be shifted forward by 2 years i.e. from 2002 to 2004. Hence k = 2. By the formula of trend shifting we have, Yc = a + b (X + K) + c (X + K)2 (it is a parabolic equation of second degree) Substituting the respective values in the above, we get Yc = 20.3 + 0.4 (X + 2) + 0.5 (X + 2)2 = 20.3 + 0.4 X + 0.8 + 0.5 (X2 + 4X + 4) = 20.3 + 0.4X + 0.8 + 0.5X2 + 2X + 2 =

In the above equation, it must be seen that the values of both the a and b have been changed, whereas the value of c has remained unchanged. This is because; it was the case of shifting a parabolic equation of second degree.

Turn static files into dynamic content formats.

Create a flipbook