Medical: Red Blood Cell Volume 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 m 5 28 ml/kg (Reference: Laboratory and Diagnostic Tests by F. Fischbach). Red blood cell volume that is too low or too high can indicate a medical problem (see reference). Suppose that Roger has had seven blood tests, and the red blood cell volumes were 32 25 41 35 30 37 29 The sample mean is x < 32.7 ml/kg. Let x be a random variable that represents Roger’s red blood cell volume.

Assume that x has a normal distribution and s 5 4.75.

Do the data indicate that Roger’s red blood cell volume is different (either way) from m 5 28 ml/kg?

Use a 0.01 level of significance.

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