(i) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to two decimal places.) x = s = (ii) Do the given data indicate that the population mean RBC count for
Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic millimeter of whole blood. Then x has a distribution that is approximately normal. For the population of healthy female adults, suppose the mean of the x 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.
| 4.9 | 4.2 | 4.5 | 4.1 | 4.4 | 4.3 |
(i) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to two decimal places.)
| x | = | |
| s | = |
(ii) Do the given data indicate that the population mean RBC count for this patient is lower than 4.68? Use ? = 0.05.
(b) What is the value of the sample test statistic? (Round your answer to three decimal places.)
| 14 | 18 | 17 | 20 | 15 | 12 | 15 | 17 | 17 | 10 |
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