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Rating Wines from the Piedmont Region of Italy Wine Spectator magazine contains articles and reviews on every aspect of the wine industry, including ratings of

Rating Wines from the Piedmont Region of Italy

Wine Spectator magazine contains articles and reviews on every aspect of the wine industry, including ratings of wine from around the world. In a recent issue they reviewed and scored 475 wines from the Piedmont region of Italy using a 100-point scale. The following table shows how the Wine Spectator score each wine received is used to rate each wine as being classic, outstanding, very good, good, mediocre, or not recommended.

Score Rating
95100 Classic: a great wine
9094 Outstanding: a wine of superior character and style
8589 Very good: a wine with special qualities
8084 Good: a solid, well-made wine
7579 Mediocre: a drinkable wine that may have minor flaws
below 75 Not recommended
Number Wine Price Score Rating
1 Barolo 2006 52 91 Outstanding
2 Barbera d'Alba Superiore 2007 30 90 Outstanding
3 Barbera Piemonte Castelvero 2009 10 80 Good
4 Barolo Cannubi 2006 120 93 Outstanding
5 Barolo San Pietro 2006 75 91 Outstanding
6 Chardonnay Langhe 2009 20 83 Good
7 Gavi Minaia 2009 39 87 Very Good
8 Langhe Faletto 2007 50 91 Outstanding
9 Favorita Langhe White 2008 18 87 Very Good
10 Langhe Brandini & Brandini 2008 31 88 Very Good
11 Arneis Langhe 2009 18 84 Good
12 Barolo Vigneto La Villa 2006 48 93 Outstanding
13 Barbaresco Curr 2007 55 92 Outstanding
14 Barolo Monfortino Riserva 2002 375 98 Classic
15 Barbera d'Alba Lirano Soprano 2007 56 91 Outstanding
16 Barbera d'Alba Superiore 2006 38 90 Outstanding
17 Barolo Rocche dell'Annunziata 2006 100 93 Outstanding
18 Barbaresco Silvio Giamello Vicenziana 2005 42 92 Outstanding
19 Roero Arneis Renesio 2009 35 89 Very Good
20 Langhe Sor San Lorenzo 2007 440 97 Classic
21 Barbaresco Silvio Giamello Vicenziana 2006 39 89 Very Good
22 Barbera d'Alba La Gamberaja 2007 35 87 Very Good
23 Langhe White Cinerino 2008 38 86 Very Good
24 Barolo Bricco Viole 2006 53 88 Very Good
25 Barbera d'Alba Tradizione 2007 20 88 Very Good
26 Barbera d'Alba 2009 25 89 Very Good
27 Roero Arneis Valle dei Lunghi 2009 20 84 Good
28 Piemonte La Valletta 2008 29 82 Good
29 Barolo Brunate 2006 90 91 Outstanding
30 Barolo Vigna Rionda 2004 125 91 Outstanding
31 Barolo Gramolere 2006 55 90 Outstanding
32 Barbera d'Asti Superiore Chers 2006 25 92 Outstanding
33 Barbera d'Alba 2008 25 93 Outstanding
34 Barbera d'Alba Serraboella 2008 32 89 Very Good
35 Cortese Piemonte Castelvero 2009 10 84 Good
36 Barolo Bussia Romirasco 2006 180 97 Classic
37 Roero Arneis Saglietto 2008 27 90 Outstanding
38 Barbaresco Bricco Asili 2007 147 92 Outstanding
39 Barbera d'Alba Superiore 2008 38 89 Very Good
40 Barolo Prap 2005 57 89 Very Good
41 Moscato d'Asti 2009 22 89 Very Good
42 Gavi Vigna del Lago 2009 19 87 Very Good
43 Barbaresco Serraboella 2007 72 94 Outstanding
44 Barolo Bussia Colonnello 2006 150 94 Outstanding
45 Barolo Vigneto Arborina 2006 60 93 Outstanding
46 Dolcetto d'Alba Fontanazza 2009 17 88 Very Good
47 Barolo 2006 55 88 Very Good
48 Gavi 2009 18 86 Very Good
49 Gavi 2009 19 88 Very Good
50 Barbaresco Il Bricco 2006 109 91 Outstanding
51 Barbera d'Alba Filatura 2008 12 87 Very Good
52 Barbera d'Alba Zio Nando 2008 35 89 Very Good
53 Dolcetto d'Alba 2009 20 89 Very Good
54 Barbaresco 2007 210 93 Outstanding
55 Chardonnay Langhe 2009 21 78 Mediocre
56 Barolo 2006 37 93 Outstanding
57 Langhe 2006 16 89 Very Good
58 Barbaresco Ovello 2006 58 88 Very Good
59 Nebbiolo Langhe Cerretta 2008 75 92 Outstanding
60 Barbera d'Asti Superiore Montruc 2008 39 88 Very Good
61 Barolo Le Rocche del Falletto Riserva 2004 300 96 Classic
62 Barbaresco 2007 35 90 Outstanding
63 Dolcetto d'Alba 2009 22 90 Outstanding
64 Barolo 2006 90 92 Outstanding
65 Barolo Preda 2006 95 93 Outstanding
66 Barbera del Monferrato Superiore Perlydia 2003 21 89 Very Good
67 Grangia NV 10 83 Good
68 Langhe White Le Pernici 2009 25 86 Very Good
69 Barbera d'Asti Superiore Il Cascinone Rive 2007 29 90 Outstanding
70 Barbera d'Alba Piani 2008 23 89 Very Good
71 Barolo Ciabot Mentin Ginestra 2006 90 96 Classic
72 Dolcetto d'Alba 2009 18 88 Very Good
73 Barbera d'Asti Bricco dell'Uccellone 2007 54 89 Very Good
74 Barolo Marenca 2006 62 96 Classic
75 Chardonnay Piemonte L'Altro 2009 21 88 Very Good
76 Barolo Serralunga 2006 37 88 Very Good
77 Dolcetto d'Alba Superiore 2008 24 86 Very Good
78 Barolo 2006 52 91 Outstanding
79 Gavi Black Label 2009 55 88 Very Good
80 Langhe Sor Tildn 2007 440 95 Classic
81 Barolo Mosconi 2006 105 90 Outstanding
82 Nebbiolo Langhe Ginestrino 2008 40 89 Very Good
83 Barolo La Rosa 2006 120 92 Outstanding
84 Nebbiolo Langhe 2008 26 90 Outstanding
85 Dogliani Pap Celso 2008 28 88 Very Good
86 Barolo Lazzarito 2006 150 93 Outstanding
87 Barolo 2006 37 91 Outstanding
88 Barbaresco Asij 2007 43 89 Very Good
89 Barbaresco Vanotu 1999 120 91 Outstanding
90 Langhe Barilin 2005 25 87 Very Good
91 Barbera d'Alba Pistn 2009 25 88 Very Good
92 Barolo P Vigne 2006 40 90 Outstanding
93 Barolo Broglio 2005 57 90 Outstanding
94 Dogliani Sir d'Jermu 2008 27 89 Very Good
95 Dolcetto d'Alba 2008 19 88 Very Good
96 Gavi La Luciana 2009 15 87 Very Good
97 Dolcetto d'Alba Autinot 2009 13 88 Very Good
98 Barolo Rocche di Castiglione 2006 69 92 Outstanding
99 Dolcetto d'Alba 2008 13 87 Very Good
100 Chardonnay Langhe Bastia 2008 50 87 Very Good

A key question for most consumers is whether paying more for a bottle of wine will result in a better wine. To investigate this question for wines from the Piedmont region we selected a random sample of 100 wines from the 475 wines that Wine Spectator reviewed. The data, contained in the file WineRatings, shows the price ($), the Wine Spectator score, and the rating for each wine.

Managerial Report

Develop a table that shows the number of wines that were classified as classic, outstanding, very good, good, mediocre, and not recommended and the average price. Does there appear to be any relationship between the price of the wine and the Wine Spectator rating? Are there any other aspects of your initial summary of the data that stand out?

Develop a scatter diagram with price on the horizontal axis and the Wine Spectator score on the vertical axis. Does the relationship between price and score appear to be linear?

Using linear regression, develop an estimated regression equation that can be used to predict the score given the price of the wine.

Using a second-order model, develop an estimated regression equation that can be used to predict the score given the price of the wine.

Compare the results from fitting a linear model and fitting a second-order model.

As an alternative to fitting a second-order model, fit a model using the natural logarithm of price as the independent variable. Compare the results with the second-order model.

Based upon your analysis, would you say that spending more for a bottle of wine will provide a better wine?

Suppose that you want to spend a maximum of $30 for a bottle of wine. In this case, will spending closer to your upper limit for price result in a better wine than a much lower price? **Request: It would be great and appreciated if you could provide explanations of how to do it exactly in Excel and also screenshots from Excel for the following questions:

Using linear regression, develop an estimated regression equation that can be used to predict the score given the price of the wine.

Using a second-order model, develop an estimated regression equation that can be used to predict the score given the price of the wine.

Compare the results from fitting a linear model and fitting a second-order model.

As an alternative to fitting a second-order model, fit a model using the natural logarithm of price as the independent variable. Compare the results with the second-order model. Thank you!

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