Question

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.

Answer 1

- 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.