Disease Detectives B/C Question Marathon

Test your knowledge of various Science Olympiad events
CaRoLyN_s
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Re: Disease Detectives B/C Question Marathon

Postby CaRoLyN_s » October 30th, 2013, 11:53 am

I have an idea, I'll wait 3 days before answering a question on here, if somebody doesn't answer it by then, I will.

What are false positives and false negatives and why are they important when investigating an outbreak?
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Disease Detectives
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AstroRockShock
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Re: Disease Detectives B/C Question Marathon

Postby AstroRockShock » October 30th, 2013, 8:36 pm

I have an idea, I'll wait 3 days before answering a question on here, if somebody doesn't answer it by then, I will.

What are false positives and false negatives and why are they important when investigating an outbreak?
Okay, not a bad idea...
False Positives are where you say something is false even though it is true.
False Negatives are where you say something is true even though it is false.

False Positives occur when there is enough random variation in the population to assume that something has changed, on the other hand False Negatives occur when the change is too small to think much has changed.

CaRoLyN_s
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Re: Disease Detectives B/C Question Marathon

Postby CaRoLyN_s » November 3rd, 2013, 5:59 am

I have an idea, I'll wait 3 days before answering a question on here, if somebody doesn't answer it by then, I will.

What are false positives and false negatives and why are they important when investigating an outbreak?
Okay, not a bad idea...
False Positives are where you say something is false even though it is true.
False Negatives are where you say something is true even though it is false.

False Positives occur when there is enough random variation in the population to assume that something has changed, on the other hand False Negatives occur when the change is too small to think much has changed.
I think you mixed 'em up.
2014 Events:
Disease Detectives
Sounds of Music
Meteorology
Simple Machines

Jajamola88
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Re: Disease Detectives B/C Question Marathon

Postby Jajamola88 » November 4th, 2013, 8:17 pm

Umm...here's a question!

What's the difference between an outbreak, an epidemic, and a pandemic?

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CulturallyScientific
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Re: Disease Detectives B/C Question Marathon

Postby CulturallyScientific » November 4th, 2013, 9:02 pm

Here are my tries:
Outbreak: occurrence of more cases of a health condition than usual in a given area. Epidemic: a widely dispersed, rapidly spreading occurrence of disease in an area. Pandemic: an epidemic on a global scale.
'16, she/her, environmental-scientist-to-be: green gen, invasives, disease, ex. design, widi.

"…everything flows in an eternal present." (James Joyce)

CaRoLyN_s
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Re: Disease Detectives B/C Question Marathon

Postby CaRoLyN_s » November 17th, 2013, 8:03 am

Here are my tries:
Outbreak: occurrence of more cases of a health condition than usual in a given area. Epidemic: a widely dispersed, rapidly spreading occurrence of disease in an area. Pandemic: an epidemic on a global scale.

You're correct, continue! :D
Let's keep this marathon alive!
2014 Events:
Disease Detectives
Sounds of Music
Meteorology
Simple Machines

nomynameisnotkevin
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Re: Disease Detectives B/C Question Marathon

Postby nomynameisnotkevin » November 17th, 2013, 11:23 am

Ok, so I encountered a question regarding immunity for a certain illness (stomach flu/gastroenteritis).
So without further adieu, maybe someone can help out with this question.
Is Immunity generally lifelong (I assume for this illness, the question isn't clear).? (True/False, and why)

Here's an extra question in case the first question is terrible:
If there is a epi-curve that is stratified (stacked segments of bars for different age groups), is the peak where there's the highest number of any group? or is the peak at where the highest aggregate bar (add up all the sections and see which one stacks the highest)?

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CulturallyScientific
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Re: Disease Detectives B/C Question Marathon

Postby CulturallyScientific » November 17th, 2013, 8:24 pm

Next question for the marathon!

The National Health Interview Survey reported the percent of respondents with a hearing problem by age group during 2005. Would it be correct to state that the risk of hearing loss increases with age? Be sure to explain and defend your answer.

DATA:
8.2% of 18-44 year-olds reported a hearing problem.
19.2% of 45-64 year-olds reported a hearing problem.
30.4% of 65-74 year-olds reported a hearing problem.
48.1% of 75+ year-olds reported a hearing problem.
'16, she/her, environmental-scientist-to-be: green gen, invasives, disease, ex. design, widi.

"…everything flows in an eternal present." (James Joyce)

nomynameisnotkevin
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Re: Disease Detectives B/C Question Marathon

Postby nomynameisnotkevin » November 21st, 2013, 4:42 pm

I can see this going two ways:

1. Yes, this can be assumed, as much more people that are older (higher percent) have such an issue.

My AP Stats background tells me:

2. NO! First of all, we don't know if it is a ramdom sample, so we don't know if we can apply it to the population. In addition, what constitutes as a hearing problem? Third of all, the syntax of risk of hearing loss increases with age is poor, as it's not necessary that the risk goes up to cause these #s. For example, there are more young people that are healthy than old people. So not everyone lives to an age beyond 75. Those who do may often encounter degenerative diseases simply for living longer, not that the risk of hearing loss increases with age, but that you have longer to develop a problem, if that makes sense.

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CulturallyScientific
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Re: Disease Detectives B/C Question Marathon

Postby CulturallyScientific » November 21st, 2013, 7:49 pm

I can see this going two ways:

1. Yes, this can be assumed, as much more people that are older (higher percent) have such an issue.

My AP Stats background tells me:

2. NO! First of all, we don't know if it is a ramdom sample, so we don't know if we can apply it to the population. In addition, what constitutes as a hearing problem? Third of all, the syntax of risk of hearing loss increases with age is poor, as it's not necessary that the risk goes up to cause these #s. For example, there are more young people that are healthy than old people. So not everyone lives to an age beyond 75. Those who do may often encounter degenerative diseases simply for living longer, not that the risk of hearing loss increases with age, but that you have longer to develop a problem, if that makes sense.
In response to your answers:
1. Incorrect... the reasoning is not correct.
2. Yes, it is a random sample, with equal numbers of randomly sampled people per age group. A hearing problem is simply what it says - a medical condition/issue with hearing.
I won't really comment on the rest of your reasoning for the rest of your 2nd point, since you don't use it to support your response to the original question: whether or not it would be correct to state the risk of hearing loss increases with age, based on the data given.
'16, she/her, environmental-scientist-to-be: green gen, invasives, disease, ex. design, widi.

"…everything flows in an eternal present." (James Joyce)


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