Asimple random sample of 5757 adults is obtained from a normally distributed? population, and each? person's red blood cell count? (in cells per? microliter is measured. the sample mean is 5.265.26 and the sample standard deviation is 0.520.52. use a 0.050.05 significance level and the given calculator display to test the claim that the sample is from a population with a mean less than 5.4 comma5.4, which is a value often used for the upper limit of the range of normal values. what do the results suggest about the sample? group