1. Suppose that 10% of a population carries antibodies to a virus. For a research project, you need 38 people with antibodies to the virus. How many people should you test so that the expected number of people with the antibodies is 38?

Round up to a whole number.

2. Suppose that 14% of a population carries antibodies to a virus. For a research project, you need 10 people with antibodies to the virus. How many people must you test to be 95% certain of getting at least 10 people with the antibodies?

The problem will need some trial and error..you are trying to find n so that P(X>=10)=0.95

This is for a stats class I am taking. We are in chapter 4, Discrete Random Variables. There are no other questions like it, in the chapter.

I addition to steps to solve, by hand and/or with calc, I would like the name of this type of question so I can learn about them for the exam.

Thank you in advance for any help

Round up to a whole number.

2. Suppose that 14% of a population carries antibodies to a virus. For a research project, you need 10 people with antibodies to the virus. How many people must you test to be 95% certain of getting at least 10 people with the antibodies?

The problem will need some trial and error..you are trying to find n so that P(X>=10)=0.95

This is for a stats class I am taking. We are in chapter 4, Discrete Random Variables. There are no other questions like it, in the chapter.

I addition to steps to solve, by hand and/or with calc, I would like the name of this type of question so I can learn about them for the exam.

Thank you in advance for any help

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