FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A researcher studying reaction time of drivers states that, “A 95% confidence interval for the mean time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him is 1.2 to 1.8 seconds. What are the point estimate and margin of error for this interval?
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Point estimate = 1.2 seconds; margin of error = 0.6 seconds.
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Point estimate = 1.2 seconds; margin of error = 0.3 seconds.
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Point estimate = 1.5 seconds; margin of error = 0.6 seconds.
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Point estimate = 1.5 seconds; margin of error = 0.3 seconds.
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Explanation:
Detailed explanation-1: -A researcher studying reaction time of drivers states that, “A 95% confidence interval for the mean time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him is 1.2 to 1.8 seconds.
Detailed explanation-2: -A 95% confidence interval for the mean was computed with a sample of size 90 to be (16, 22). Then the Error is ±3. Suppose data was collected with n = 36 to compute a 95% confidence interval. If the population standard deviation is 2400, then the Error is ±784.
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