help with result of question3 please? needed and confused. for both 2004-2005 an
ID: 3366079 • Letter: H
Question
help with result of question3 please? needed and confused.
for both 2004-2005 and 1994-1995. The data can be found on the book web site in the file HoustonChronicle.csv. Use analysis of covariance to decide whether (a) An increase in the percentage of low income students is associated with an increase in the percentage of students repeating first grade. (b) There has been an increase in the percentage of students repeating first grade between 1994-1995 and 2004-2005 (c) Any association between the percentage of students repeating first grade and the percentage of low-income students differs between 1994-1995 and 2004-2005. 3. Chateau Latour is widely acknowledged as one of the world's greatest wine estates with a rich history dating back to at least 1638. The Grand Vin de Chateau Latour is a wine of incredible power and longevity. At a tasting in New York in April 2000, the 1863 and 1899 vintages of Latour were rated alongside the 1945 and the 1961 vintages as the best in a line-up of 39 vintages ranging from 1863 to 1999 (Wine Spectator, August 31, 2000). Quality of a particular vintage of Chateau Latour has a huge impact on price. For example, in March 2007, the 1997 vintage of Chateau Latour could be purchased for as little as $159 per bottle while the 2000 vintage of Chateau Latour costs as least $700 per bottle (www.wine-searcher.com). pes While many studies have identified that the timing of the harvest of the gra has an important effect on the quality of the vintage, with quality improving the earlier the harvest. A less explored issue of interest is the effect of unwanted rain at vintage time on the quality of icon wine like Chateau Latour. This question addresses this issue. 5:02 P 25Explanation / Answer
(a) From the result, we see that p-value is 0.0120 which is less than 0.05 level of significance. We reject the null hypothesis becuase coefficient of interaction terms in model is statistical significant. We concluded that rate of change in quality rainy is depend upon the unwanted rain at vintage.
(b) The estimated model is
Quality = 5.16122-0.03145*End of Harvest +1.7867*Rain-0.08314*(End of Harvest*Rain)
(i) no unwanted rain at harvest
Quality = 5.16122-0.03145*End of Harvest +1.7867*0-0.08314*(End of Harvest*0)
Quality = 5.16122-0.03145*End of Harvest
if quality is 1, then
1= 5.16122-0.03145*End of Harvest
End of Harvest =132
(ii) Some unwanted rain at harvest
Quality = 5.16122-0.03145*End of Harvest +1.7867*1-0.08314*(End of Harvest*1)
Quality = 6.94792-0.11459*End of Harvest
if quality is 1, then
End of Harvest= 52
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