The medical team believes it can demonstrate that factor x is raised in the bloodstream by an average of more than 1.5. in what follows let µ1 denote the average of factor x with the with the new medication and let µ2 denote the average level of factor x with the placebo. the team establishes a 1% level of significance. the team thinks that it can establish the alternative hypothesis ha: − > 1.50.referring to increase, find the critical value. a) -4.541 b) 4.541 c) ±5.841 d) -1.638 e) 2.998