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The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that earn 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? A. Yes, all the conditions are satisfied. OB. No, the 2000 data contains outliers. OC. No, the variances are drastically different. O D. No, the 2001 data is too skewed. O 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 (). (Round to one decimal place as needed.) Wine rating, price and vintage table. Rating 93 93 90 89 91 95 95 90 91 93 88 93 91 Price Vintage 130 2000 30 2000 45 2001 9 2000 33 2001 117 2000 125 2001 19 2001 17 2000 33 2000 15 2001 36 2000 85 2001 Rating 93 91 93 90 91 ៦ 5 8 5 ៩ ឌ ៩៦ ៩ 91 93 91 92 93 92 91 92 Price Vintage 72 2000 23 2001 40 2000 45 2000 50 2000 50 2000 29 2001 40 2000 42 2001 50 2001 50 2001 80 2000 23 2001 Full data se

The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that earn 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? A. Yes, all the conditions are satisfied. OB. No, the 2000 data contains outliers. OC. No, the variances are drastically different. O D. No, the 2001 data is too skewed. O 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 (). (Round to one decimal place as needed.) Wine rating, price and vintage table. Rating 93 93 90 89 91 95 95 90 91 93 88 93 91 Price Vintage 130 2000 30 2000 45 2001 9 2000 33 2001 117 2000 125 2001 19 2001 17 2000 33 2000 15 2001 36 2000 85 2001 Rating 93 91 93 90 91 ៦ 5 8 5 ៩ ឌ ៩៦ ៩ 91 93 91 92 93 92 91 92 Price Vintage 72 2000 23 2001 40 2000 45 2000 50 2000 50 2000 29 2001 40 2000 42 2001 50 2001 50 2001 80 2000 23 2001 Full data se

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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(c) Suggest one or two possible sources of confounding that might distort the confidence interval reported in part b. Select all that apply. A. The numerical scale used to rate the wine. B. The type of grape used. C. The region where the wine comes from. D. The number of bottles of the vintage produced. (d) Given a choice between a 2000 and 2001 vintage at the same price, which would you choose? Does it matter? A. There is a statistically significant between the two. Always choose the 2000 vintage. B. It is not statistically significant but on average the 2001 vintage scores slightly higher than the 2000 vintage. C. There is a statistically significant difference between the two. Always choose the 2001 vintage. D. It is not statistically significant but on average the 2000 vintage scores slightly higher than the 2001 vintage.
Transcribed Image Text:(c) Suggest one or two possible sources of confounding that might distort the confidence interval reported in part b. Select all that apply. A. The numerical scale used to rate the wine. B. The type of grape used. C. The region where the wine comes from. D. The number of bottles of the vintage produced. (d) Given a choice between a 2000 and 2001 vintage at the same price, which would you choose? Does it matter? A. There is a statistically significant between the two. Always choose the 2000 vintage. B. It is not statistically significant but on average the 2001 vintage scores slightly higher than the 2000 vintage. C. There is a statistically significant difference between the two. Always choose the 2001 vintage. D. It is not statistically significant but on average the 2000 vintage scores slightly higher than the 2001 vintage.
The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that earn 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? A. Yes, all the conditions are satisfied. B. No, the 2000 data contains outliers. O C. No, the variances are drastically different. O D. No, the 2001 data is too skewed. O 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 H2000-2001 is (). (Round to one decimal place as needed.) Wine rating, price and vintage table. Rating 93 93 90 89 91 95 95 90 91 93 88 93 91 Price Vintage 130 2000 30 2000 45 2001 9 2000 33 2001 117 2000 125 2001 19 2001 17 2000 33 2000 15 2001 36 2000 85 2001 Rating 93 91 93 90 91 91 93 91 92 93 92 91 92 Price Vintage 72 2000 23 2001 40 2000 45 2000 50 2000 50 2000 29 2001 40 2000 42 2001 50 2001 50 2001 80 2000 23 2001 Full data set
Transcribed Image Text:The recommendations of respected wine critics have a substantial effect on the price of wine. Vintages that earn 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? A. Yes, all the conditions are satisfied. B. No, the 2000 data contains outliers. O C. No, the variances are drastically different. O D. No, the 2001 data is too skewed. O 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 H2000-2001 is (). (Round to one decimal place as needed.) Wine rating, price and vintage table. Rating 93 93 90 89 91 95 95 90 91 93 88 93 91 Price Vintage 130 2000 30 2000 45 2001 9 2000 33 2001 117 2000 125 2001 19 2001 17 2000 33 2000 15 2001 36 2000 85 2001 Rating 93 91 93 90 91 91 93 91 92 93 92 91 92 Price Vintage 72 2000 23 2001 40 2000 45 2000 50 2000 50 2000 29 2001 40 2000 42 2001 50 2001 50 2001 80 2000 23 2001 Full data set
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