The braking distances of a simple random sample of cars: 95% confidence; n = 32, x =
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The braking distances of a simple random sample of cars: 95% confidence; n = 32, x = 137 ft, and σ is known to be 7 ft.
Find the margin of error and confidence interval if the necessary requirements are satisfied. If the requirements are not all satisfied, state that the margin of error and confidence interval cannot be calculated using the methods of this section.
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