Solution: You are the manager of the blood bank for the RS Hernandez Memorial Hospital in Jackson County, CA. Your resident hematologist believes that
Question: You are the manager of the blood bank for the RS Hernandez Memorial Hospital in
Jackson County, CA. Your resident hematologist believes that the white blood cell (WBC) counts are normally distributed within the population. He asks you to test whether there is any difference in the average number of WBCs per milliliter of blood among persons with different blood types. Your randomly select donors from each blood type and have their WBCs counted using flow cytometry.
White Blood Cell (WBC) Counts per Milliliter by Blood Group
RS Hernandez Memorial Hospital, Jackson County, CA 2008
| A | B | AB | O |
| 5000 | 7400 | 7300 | 5400 |
| 5600 | 8200 | 7200 | 7800 |
| 82000 | 5100 | 9300 | 6800 |
| 10400 | 9700 | 8600 | 9400 |
| 7700 | 6600 | 7500 | 9200 |
You have decided to analyze your data where a = .05. Please state a suitable alternative hypothesis.
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