MHB Understanding Sample Proportions and the Binomial Distribution

AI Thread Summary
The discussion revolves around understanding sample proportions and the binomial distribution in the context of a past exam question. The participant has calculated several probabilities related to a sample size of 260, but is confused about how to approach question 2d. They inquire whether a probability distribution table is necessary and seek clarification on the term "sample proportion of accurate ZikaCheck result." Another participant suggests that familiarity with the binomial distribution is essential for solving the problem. The conversation highlights the importance of understanding statistical concepts when dealing with sample proportions.
smallso
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Hi,

I am doing a past paper but I am kinda stuck on one of the questions.

These are the answers I have:
2a. 225/260 = 0.8654
2b. 32/260 * 4/32 = 0.01407
2c. 32/260 * 28/32 + 228/260 * 221/228 = 0.9577

Then for 2d, I have no idea what to do. Am i suppose to draw one of those probability distribution table? And what does it mean sample proportion of accurate ZikaCheck result?

Thank you very much.
 

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Hi smallso,

Have you covered the binomial distribution? Usually when we talk about proportions that are related to two outcomes this involves this distribution. Does that sound familiar?
 

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