For a right-tailed hypothesis test at the signicance level or, the null hypothesis Ho: n = no will be rejected in favor of the alternative hypothesis Ha: n > no if and only if no is less than or equal to the (1 (Jo-level lower condence bound for n. Illustrate the preceding relationship by obtaining the appropriate one-sided one-mean z-interval for the data below. Click here to view additional information rengingJJL'l(). Click hereto view additional information rengingJQ). Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 cf the table of areas under the standard normal curve. a. The lower condence bound for n is ppm. (Round to two decimal places as needed.) The value of no = 0.5 ppm V less than or equal to the lower condence bound for n. Therefore, at the 10% signicance level, V the null hypothesis in favor of the alternative hypothesis that the mean cadmium level is V the government's recommended limit of 0.5 ppm. This conclusion V with the one outlined in the provided summary. b. The lower condence bound for n is bpm. (Round to two decimal places as needed.) The value of no = 72 bpm V less than or equal to the lower condence bound for [4. Therefore, at the 10% signicance level. V the null hypothesis in favor of the alternative hypothesis that the mean post-work heart rate for casting workers is V the normal resting heart rate. This conclusion V with the one outlined in the provided summary. is less th Part (a) Agovernment set a safety limit for cadmium in dry,r vegetables at 0.5 parts per million (ppm). The cadmium levels in a random sample of one species of edible mushroom are in the following data set. At the 10% signicance level, the data do not provide sufcient evidence to conclude that the mean cadmium level in this species of mushroom is greater than the government's recommended limit of 0.5 ppm. Assume that the population standard deviation of cadmium levels in this species of mushroom is 0.3? ppm. favor of tl' e level d only if u lation X _part Part (b) 1part der th der th A study assessed fatigue in steel plant workers due to heat stress. A random sample of 30 casting workers had a mean post-work heart rate of 78.3 beats per minute (bpm). At the 10% significance level, the data provide sufficient evidence to conclude that the mean post-work heart rate for casting workers exceeds the normal resting heart rate of 72 bmp. Assume that the standard deviation of post-work heart rates for casting workers is 12.6 bpm. ual to othesis in ernn summary Print Done