Answered: We are interested in comparing the…

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:We are interested in comparing the average supermarket prices of two leading colas in the Tampa area. Our sample was taken by randomly going to each of eight supermarkets and recording the price of a sx-pack of cola of each brand. The data are shown in the following table. Find a 98% confidence interval for the difference in mean price of brand 1 and brand 2. Assume that the paired data came from a population that is normally distributed. Price Supermarket Brand 1 Brand 2 Difference $-0.05 $2.25 2, 3. 2.47 2.45 0.02 2.38 2.44 -0.06 -0.02 -0.10 4. 2.27 2.15 2.29 2.25 2.25 2.25 0.00 7. 8. 2.36 2.42 -0.06 -0.03 2.37 2.40 x1=2.3125 x2 2.3500 d=-0.0375 51=0.1007 52 0.0859 Sd30.0381 O (-0.0846, 0.0096) O (0.1768, 0.1018) O (0.0722, -0.0028) O (0.0779, 0.0029)

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