Find the 90% confidence interval for the variance and standard deviation for the time it takes a
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Find the 90% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a random sample of 27 trucks has a standard deviation of 6.8 minutes. Assume the variable is normally distributed.
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Related Book For 
Elementary Statistics A Step By Step Approach
ISBN: 9780077665807
9th Edition
Authors: Allan G. Bluman
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