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3) A brake light that has been in use a long time is known to have a mean reaction time of 0.8 seconds. A new

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3) A brake light that has been in use a long time is known to have a mean reaction time of 0.8 seconds. A new brake light is tried out on a random sample of 50 drivers. A 95% confidence interval for the mean reaction time for the new light (p) is (0.78, 0.86) seconds. We are interested in seeing if the two lights are different in terms of mean reaction time. Which of the following is a correct statement? a. The null hypothesis is that u

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