STATISTICAL TECHNIQUES AND TOOLS
CONFIDENCE INTERVALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Construct a 95% confidence interval:A random sample of 75 oak trees has a mean height of 62 ft. Assume a population standard deviation of 3.8 ft.
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(58.20, 65.80)
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(61.14, 62.86)
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(60.87, 63.13)
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(60.28, 63.72)
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Explanation:
Detailed explanation-1: -A 95% confidence interval for the standard normal distribution, then, is the interval (-1.96, 1.96), since 95% of the area under the curve falls within this interval.
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