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Sixty wind speed readings gave an average speed of 1105 cm/sec. From long term experience, it can be assumed that the standard deviation is 240

Sixty wind speed readings gave an average speed of 1105 cm/sec. From long term experience, it can be assumed that the standard deviation is 240 cm/sec. Find a a 90% confidence interval for the parameter of interest.

What distribution is used in constructing confidence intervals in this problem?

What is Maximal Margin of Error (E) at 90% confidence?

Construct a 90% confidence interval

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