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A soft drink company is conducting research to select a new design for their can. A...

A soft drink company is conducting research to select a new design for their can. A sample of 9 participants has been selected. Instead of a typical taste test with two different sodas, they give each participant the same soda twice. One drink is served in a predominantly red can, the other in a predominantly blue can. The order the two cans are used is chosen randomly. Participants are asked to rate each drink on a scale of 1 to 10. The mean difference between the rating of the red and blue can for the 9 participants is -0.56 with standard deviation 2.19. Researchers would like to determine whether or not the mean difference in ratings between the red and blue can is 0.

Calculate the t-test statistic for this problem.

Round your final answer to 3 decimal places.

0 0
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Answer #1

Test statistics

t = (d - d) / (Sd / sqrt(n) )

= ( -0.56 - 0) / (2.19 / sqrt(9) )

= -0.767

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