In making plastics a colourless gas is used and some will leak into the air. the manufacturer has given instructions to halt production if the mean (average ) amount of this gas in the area exceeds 3.0 parts per million (ppm). every day the safety manager plans to select a large sample n=50 air specimens and to perform a one tailed test ha µ > 3 at significance level α = 0.01. determine the lower limit of the rejection region of this test. give your answer to 2 decimal places.