(Round all Intermedlato calculations to at least 4 declmal places.) Rock \'n\' r
ID: 3230950 • Letter: #
Question
(Round all Intermedlato calculations to at least 4 declmal places.) Rock 'n' roll is a form of music that evolved in the United States and quickly spread to the rest of the world. The interest in rock music, like any other genre, has gone through ups and downs over the years. The Recording Industry Association of America (RIAA) reports consumer trends on the basis of annual data on genre, format, age, and gender of purchasers and place of purchase. The accompanying table lists the percentage (share) of total shipment of music that falls in the category of rock music from 1991-2008. Yoar Share 1991 34.8 1992 31.6 1993 30.22 1994 35.1 33.5 1996 32.6 1997 1998 25.7 25.22 24.8 2001 24.4 24.7 25.22 23.9 31.5 34.0 2007 324 31.8 2008 Click here for the Excel Data File The data are plotted below.Explanation / Answer
a) correct Answer: Option (C)
b)
From the given data
3-period moving averge = 32.7333
c)
5-period moving average = 30.72
d)
MSE of 3 years moving average = 205.24 / 15 = 13.6827
MSE of 5 years moving average = 278.3368 / 13 = 21.405
e) Correct Answe: Option (B)
3 years Year Share moving averages Error Error^2 1991 34.8 1992 31.6 1993 30.2 1994 35.1 32.2 2.9 8.41 1995 33.5 32.3 1.2 1.44 1996 32.6 32.93333333 -0.33333 0.111111 1997 32.5 33.73333333 -1.23333 1.521111 1998 25.7 32.86666667 -7.16667 51.36111 1999 25.2 30.26666667 -5.06667 25.67111 2000 24.8 27.8 -3 9 2001 24.4 25.23333333 -0.83333 0.694444 2002 24.7 24.8 -0.1 0.01 2003 25.2 24.63333333 0.566667 0.321111 2004 23.9 24.76666667 -0.86667 0.751111 2005 31.5 24.6 6.9 47.61 2006 34 26.86666667 7.133333 50.88444 2007 32.4 29.8 2.6 6.76 2008 31.8 32.63333333 -0.83333 0.694444 2009 32.73333333 205.24Related Questions
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