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Ryan, Engineer
Category: Calculus and Above
Satisfied Customers: 8838
Experience:  B.S. in Civil Engineering
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Just that questiosn : if 30% of obese patients develop

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just that questiosn
JA: The Advanced Math Tutor can help you get an A on your homework or ace your next test. Tell me more about what you need help with so we can help you best.
Customer: if 30% of obese patients develop diabetes and a physician sees 10/ obese patients, what is the prabil
ity that half will develop diabetes
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Customer: no
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Submitted: 4 months ago.
Category: Calculus and Above
Expert:  Ryan replied 4 months ago.


Thank you for using the site. I'll be happy to help you with this.

This is a binomial distribution probability problem because it meets all four requirements:

1. There are a fixed number of trials (10 patients)

2. The are only two outcomes for each trial (patient either develops diabetes, or they don't)

3. The probability of "success" is the same for each trial (30%)

4. The outcome of each trial is independent (one patient developing diabetes does not affect whether the any other patient does or does not)

The formula to use for this probability is:

P(x) = C(n, x) * (p)^x * (1 - p)^(n - x)

where n is the total number of trials (10), x is the number of successful outcomes (5 in this case, since the question asks for the probability that "half" of the 10 develop diabetes), and p is the probability of "success" for each individual trial (30% = 0.30). C(n, x) is the notation that represents the number of combinations of "x" items chosen from a pool of "n" items.

The probability that 5 of the 10 patients develop diabetes is then:

P(5) = C(10, 5) * (0.3)^5 * (1 - 0.3)^(10 - 5)

P(5) = C(10, 5) * (0.3)^5 * (0.7)^5

P(5) = 252 * 0.0024 * 0.1681

P(5) = 0.1029

Please feel free to ask if you have any questions about this solution.



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