Letx be a random variable that represents red blood cell count (RBC) in millions of cells per cubic millimeter of whole blood. Thenx has a distribution that is approximately normal. For the population of healthy female adults, suppose the mean of thex distribution is about 4.68. Suppose that a female patient has taken six laboratory blood tests over the past several months and that the RBC count data sent to the patient's doctor are as follows.
(i) Use a calculator with sample mean and standard deviation keys to find x ands. (Round your answers to two decimal places.)
(ii) Do the given data indicate that the population mean RBC count for this patient is lower than 4.68? Use ? = 0.05.
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