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Max races around the Sandvert circuit on a regular basis. We are interested in his mean lap time. We take a random sample of

Max races around the Sandvert circuit on a regular basis. We are interested in his mean lap time. We take a random sample of 100 of his laps and find that he has a mean lap time of 75.5 seconds with a sample standard deviation of 4 seconds. Calculate a 90% confidence interval Calculate a 95% confidence interval

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