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Question

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Answers

Use the following information to answer the next seven exercises: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.

Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34
Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29

Would you expect the data to be identical? Why or why not?

Okay for this problem. We're following him up. Following up on the data. About 42 sets of 40 different patients being studied for antibody effectiveness for AIDS treatments. Okay, so we have two sets of data and we have to researchers results from their data. Uh, and we're looking at medical effectiveness of the data. So what? We expect them to be the same? Not necessarily. And the question is, what we want to know is, why might the results differ? Yeah, well, we're dealing with humans. Is the general idea and so bodies reactive? A little bit different, Lee, but that's not a very specific answer. Um, and more precise answer could be a couple different reasons. It could be the stage at which they started developing cancer, and they're kind of realized that to start doing the treatments So it's gonna vary for every single person in this study. And secondly, it could be the proper consumption of the medicine or the proper if the effectiveness is affected by how well you follow, whatever the treatment directions. So to say, proper consumption of the medicine. But generally, how well they follow the prescribed response to the for using the medication to help out with her. The problem

Okay, if we perform a statistical analysis and we find that a P values 0.62 and the Alfa level given to US 0.5 we will say that we have enough statistical evidence to reject the null hypothesis, which means that this hypothesis can be rejected. And we can say that we have enough evidence to say that the proportion off the patients who develop AIDS after four years is less in the treated patients than in the untreated patients. So we reject. It's not. We will reject h not, and hence be option B is going to be an answer.

So you cannot tell if one of these is correct and one is incorrect. At this point, data is not enough. You simply just don't have enough information.

We want to check if the proportion for the treated patients is less than the proportion for untreated patients or if they remain the same. So in this case, the age not or the null hypothesis is going to be that both the proportions are the same. PT is equal toe B UT, or the alternative hypothesis will be that Petey is less than B UT duties and treated and D is treated soon. This is our answer. The correct option number is deep.


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