OHH!
Oh man. Oh man. Oh man.
See. I see it now.
Duh!
Oh man, wow.
Of course I get it now.
I knew I was overlooking the obvious.
I feel incredibly out of it right now.
Perhaps I should take a break.
Brb.
Thanks again Rodimus.
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Elementary Statistics: Could Use Some Help
- Thread starter HappyDude20
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OHH!
Oh man. Oh man. Oh man.
See. I see it now.
Duh!
Oh man, wow.
Of course I get it now.
I knew I was overlooking the obvious.
I feel incredibly out of it right now.
Perhaps I should take a break.
Brb.
Thanks again Rodimus.
I'm back with a few more
#19: When doing blood testing for HIV infections, the procedure can be made more efficient and less expensive by combining samples of blood specimens. If samples from three people are combined and the mixture tests negative, we know that all three individual samples are negative. find the probability of a positive result from three samples combined into one mixture, assuming the probability of an individual blood sample testing positive is 0.1.
The answer is 0.271, but again am not sure how?
I know i'm missing an important concept here but I'm just not reaching it.
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#19: When doing blood testing for HIV infections, the procedure can be made more efficient and less expensive by combining samples of blood specimens. If samples from three people are combined and the mixture tests negative, we know that all three individual samples are negative. find the probability of a positive result from three samples combined into one mixture, assuming the probability of an individual blood sample testing positive is 0.1.
The answer is 0.271, but again am not sure how?
I know i'm missing an important concept here but I'm just not reaching it.
qwqniwenfqiljwefnqlwfnqwkjl wqlkckqwe kweq qwke qwekdew dew dwedlmqwediocadcsajcsamjamcsjm
This is the same principle as the alarm clock quition. 0.9 is the odds of not be infected.
Post from iPod touch
In all honesty I think I'm done.
I have three more sections in chapter five that I simply cannot grasp with even one finger.
Fortunately I received an A+ on my first exam, and though Ill probably lose the battle tomorrow, ive not lost sight of the war.
But most likely it seems I may fail.
Sucks.
****.
I have three more sections in chapter five that I simply cannot grasp with even one finger.
Fortunately I received an A+ on my first exam, and though Ill probably lose the battle tomorrow, ive not lost sight of the war.
But most likely it seems I may fail.
Sucks.
****.
I recommend that after your test you keep working on the homework because the rest of the class will build off of this stuff. I can tell you right now that this is foundation stuff for stats and everything builds off of it.
Problem with math is everything in it builds off of it self
Thats funny, that is the exact reason I first told myself at the beginning of the semester in order to study for the first exam.
It did get me an A afterall.
Nevertheless I'll study the material afterwards but this sucks.
Well.....
...Math sucks.
I'm glad I got the first question right 
(Rodimus Prime: Stacking confidence intervals and standard deviations is not something that is done in elementary statistics
OP - as has been pointed out in this thread, you are depending too much on your calculator. Try to understand the basic principles behind the problems and you should be able to do almost all of them in your head without a calculator.
I have confidence in you as your English skills are pretty good, and English is just as complex as maths.
I did a lot of maths in school, and to be honest, very little of it I actually use in my daily life. What has been crucial however is my analytical skills - to look at a problem and pick out the important parts, and secondly, to guessestimate a rough answer in my head to verify that the answer the calculator or computer or authority gives me is actually somewhere near being correct. I do that every day in work and at home. I developed that partially through maths.
The adult world is full of verbiage. Being able to pick out the important points or tell when you're being conned with numbers is crucial.
(Rodimus Prime: Stacking confidence intervals and standard deviations is not something that is done in elementary statistics
OP - as has been pointed out in this thread, you are depending too much on your calculator. Try to understand the basic principles behind the problems and you should be able to do almost all of them in your head without a calculator.
I have confidence in you as your English skills are pretty good, and English is just as complex as maths.
I did a lot of maths in school, and to be honest, very little of it I actually use in my daily life. What has been crucial however is my analytical skills - to look at a problem and pick out the important parts, and secondly, to guessestimate a rough answer in my head to verify that the answer the calculator or computer or authority gives me is actually somewhere near being correct. I do that every day in work and at home. I developed that partially through maths.
The adult world is full of verbiage. Being able to pick out the important points or tell when you're being conned with numbers is crucial.