Going to work: A news report stated that the mean distance that commuters in the United States travel each way to work is 1'? miles. Assume the standard deviation is 9 miles. A sample of 70 commuters is chosen. (b) what is the probability that the sample mean commute distance is between 19 and 20 miles? Round the answer to at least four decimal places. The probability that the sample mean commute distance is between 19 and 20 miles is [j