Show transcribed image text Part B takes 70 measurements of speed on a roadway segment. The distribution of speeds on the freeway is known to be Question 1: A traffic engineer sample mean is 40 mph. The population normally distributed with a standard deviation of 10 mph Determine the 90 % confidence interval for speed?
Part B takes 70 measurements of speed on a roadway segment. The distribution of speeds on the freeway is known to be Question 1: A traffic engineer sample mean is 40 mph. The population normally distributed with a standard deviation of 10 mph Determine the 90 % confidence interval for speed?
