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6 May, 06:59

Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes. assume the variable is normally distributed.

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  1. 6 May, 07:03
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    - Find the 90% confidence interval for the standard deviation for the time it takes aninspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes. Assume the variable is normally distributed ... Best Answer: Let X be the time it takes an inspector tocheck a bus n = 27 [PDF] Setiio/t 7.
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