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