The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that eam higher ratings command higher prices and spark surges in demand. These data are a random sample of ratings of wines selected from an online Web site from the 2000 and 2001 vintages. Complete parts (a) through (d). Click the icon to view the table of wine rating. price, and vintage. (a) Do the ratings meet the conditions needed for a two-sample confidence interval? Yes, all the conditions are satisfied. No, the 2001 data is too skewed. No, the variances are drastically different. D. No, the 2000 data contains outliers. E. No, the sampling procedure was not identified and it cannot be concluded that this is a simple random survey. (b) Find the 95% confidence interval for the difference in average ratings in these two vintages. Does one of the years look better than the other? The 95% confidence interval for 2000-2001 is (-0.9 1.8) (Round to one decimal place as needed.)
The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that eam higher ratings command higher prices and spark surges in demand. These data are a random sample of ratings of wines selected from an online Web site from the 2000 and 2001 vintages. Complete parts (a) through (d). Click the icon to view the table of wine rating. price, and vintage. (a) Do the ratings meet the conditions needed for a two-sample confidence interval? Yes, all the conditions are satisfied. No, the 2001 data is too skewed. No, the variances are drastically different. D. No, the 2000 data contains outliers. E. No, the sampling procedure was not identified and it cannot be concluded that this is a simple random survey. (b) Find the 95% confidence interval for the difference in average ratings in these two vintages. Does one of the years look better than the other? The 95% confidence interval for 2000-2001 is (-0.9 1.8) (Round to one decimal place as needed.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Ratin
The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that eam higher ratings command
higher prices and spark surges in demand. These data are a random sample of ratings of wines selected from an online Web site from the
2000 and 2001 vintages. Complete parts (a) through (d).
Click the icon to view the table of wine rating. price, and vintage.
(a) Do the ratings meet the conditions needed for a two-sample confidence interval?
(b) Find the 95% confidence interval for the difference in average ratings in these two vintages. Does one of the years look better than
the other?
The 95% confidence interval for 2000-2001 is (-0.9 1.8
(Round to one decimal place as needed.)
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A. Yes, all the conditions are satisfied.
B. No, the 2001 data is too skewed.
C. No, the variances are drastically different.
D.
No, the 2000 data contains outliers.
E. No, the sampling procedure was not identified and it cannot be concluded that this is a simple random survey.
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Help me solve this View an example Get more help.
Price Vintag
130
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45
9
33
117
125
19
17
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15
36
85
72
23
40
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29
40
42
50
50
80
23
2000
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2001
2000
2001
2001
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2000
2001
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2001
2001
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MEAN
SD
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Rating Price Vintage
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
2000
92
92
88
94
91
91
x1-x2
E
91
94
93
92
91
93
91
91
91.71429
1.540658
130
30
9
117
17
33
36
72
40
45
50
50
40
80
53.5
df
2.009575
0.464286
1.38423
2000
2000 MEAN
2000 SD
49.79207
Clear all
-0.91994 1.848515
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Rating
Final check
1.912875
Price
90
91
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88
90
92
93
91
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92
91.25 44.91667
45
33
125
19
15
85
23
29
42
50
50
23
Vintage
2001
2001
2001
2001
2001
2001
2001
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2001
2001
2001
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