A clinical investigator has developed two new treatments (treatment A and B) for high cholesterol. T Show more A clinical investigator has developed two new treatments (treatment A and B) for high cholesterol. The investigator is not sure which treatment will significantly reduce the average cholesterol level. There were a total of 140 people randomized into the two treatments but some of the participants dropped from treatment B. The investigator wants the level of significance to be fairly stringent at 5%. 1. State the hypothesis the investigator wants to tests. Use mathematics notation (i.e. H0 and HA) 2. What is the additional condition required to use the pooled t-test? Are these met? If not which test should you use? Show less
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