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pmastchief
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Bonus Question on Extra Credit work...
How can I do this, where do I start? I haven't taken stats before so I'm just curious to see if someone could show me how:
A study considered risk factors for HIV infections among IV drug users. It found that 40% of users who had less than or equal to 100 injections per month (light users) and 55% of users who had greater than 100 injections per month (heavy users) were HIV positive.
Suppose we have a group of 10 light users and 10 heavy users.
What is the probability that exactly 3 of the 20 users are HIV positive?
I'm interested in the methodology and the solution if possible.
Thanks for your help!
How can I do this, where do I start? I haven't taken stats before so I'm just curious to see if someone could show me how:
A study considered risk factors for HIV infections among IV drug users. It found that 40% of users who had less than or equal to 100 injections per month (light users) and 55% of users who had greater than 100 injections per month (heavy users) were HIV positive.
Suppose we have a group of 10 light users and 10 heavy users.
What is the probability that exactly 3 of the 20 users are HIV positive?
I'm interested in the methodology and the solution if possible.
Thanks for your help!