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A study investigated whether price affects people s judgment Twenty people each tasted six cabernet sauvignon wines and rated how they liked them on a scale of 1 to 6 Prior to tasting each wine participants were told the price of wine Of the six wines tasted two were actually the same wine but for one tasting the participant was told that the wine cost 10 per bottle and for the other tasting the participant was told that the wine cost 90 per bottle The participants were randomly assigned to either taste the wine claimed to be 90 first and the wine claimed to be 10 second or the 10 wine first and the 90 wine second Differences were calculated by subtracting the rating for the tasting in which the participant thought the wine cost 10 from the rating for the tasting in which the participant thought the wine cost 90 The differences that follow are consistent with summary quantities given in the paper Difference in Rating 90 10 4321 0 0 3 2 USE SALT 0 Interpret the interval 2 3 3 3 1 4 1 1 1 1 1 Use the data given above to construct a 90 confidence interval for the difference in mean rating assigned to the wine when the cost is described as 90 and when the cost is described as 10 Use 90 10 Enter your answer using interval notation Round your numerical values to four decimal places We are 90 confident that the true difference in mean rating assigned to the wine when the cost is described as 90 and when the cost is described as 10 falls within this interval The bounds of the interval suggest the mean rating was higher when the cost is described as 90

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