Total blood volume (in ml) per body weight (in kg) is important in medical research. for healthy adults, the red blood cell volume mean is about = 28 / (reference: laboratory and diagnostic tests by f. fischbach). red blood cell volume that is too low or too high can indicate a medical problem. suppose that roger has had seven blood tests, and the red blood cell volumes were 32, 25, 41, 35, 30, 37, 29 let x be a random variable that represents roger’s red blood cell volume. assume that x has a normal distribution and = 4.75. do the data indicate that roger’s red blood cell volume is different from = 28 / use a 0.01 level of significance?