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# Problem 4A rare disease affects one in every one million people on average in the US. A national public health organization investigates large sample of people in t...

## Question

###### Problem 4A rare disease affects one in every one million people on average in the US. A national public health organization investigates large sample of people in the US. Assume all people inves- tigated are independent of each other in terms of this disease_ In each of the questions below, select THE SINGLE correct statement.questionsand (b), please pick the most appropriate of the multiple-choice answers.Assume the people are investigated one after another: Let X be the number of people invest

Problem 4 A rare disease affects one in every one million people on average in the US. A national public health organization investigates large sample of people in the US. Assume all people inves- tigated are independent of each other in terms of this disease_ In each of the questions below, select THE SINGLE correct statement. questions and (b), please pick the most appropriate of the multiple-choice answers. Assume the people are investigated one after another: Let X be the number of people investigated until the organization finds the first person with the disease. The average and standard deviation of X are about With Xas in (a), the chance that the organization has to investigate 2000000 people before finding their first person with the disease is In a group of 10 people chosen at random by the organization, the probability that at least three people have the disease is equal (d) In & group of 200,000 people chosen at random by the organization, the number of peo ple in the group with the disease is best modeled as With the situation as in (d), the number of people in the group with the disease has an expectation and standard deviation respectively equal to

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