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# Confidence interval estimation

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In a certain region of the country, average radar echo duration of lightning flashes is .81 sec and a standard deviation of .34 sec. Note, that these are population values. Calculate a 99% (two sided) confidence interval for the true average echo duration ? , for a random sample of 100 lightening flashes

https://brainmass.com/statistics/confidence-interval/confidence-interval-estimation-346858

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Confidence Interval
In a certain region of the country, average radar echo duration of lightning flashes is .81 sec and a standard deviation of .34 sec. Note, that these are population ...

#### Solution Summary

Step by step method for computing confidence interval is given in the answer. A random sample of 100 lightening flashes is examined.

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