STAT 50300 Chapter Notes - Chapter 4-5: Neuroblastoma, Random Variable, Standard Deviation
5 Feb 2018
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Homework 4 (50 points) due on 9/22*). 40 : the shell of the land snail limocolaria martensiana has two possible color forms: streaked and pallid. In a certain population of these snails, 60% of the individuals have streaked shells. Suppose that a random sample of 10 snails is to be chosen from this population. Find the probability that the percentage of streaked-shelled snails in the sample will be. Sd(x)= (cid:4666)(cid:883) (cid:4667)= (cid:4666)(cid:883)(cid:882)(cid:4667) (cid:4666)(cid:882). 6(cid:882)(cid:4667) (cid:4666)(cid:883) (cid:882). 6(cid:882)(cid:4667)= 1. 549 1. 55: neuroblastoma is a rare, serious, but treatable dis ease. A urine test, the vma test, has been developed that gives a positive diagnosis in about 70% of cases of neuroblastoma. It has been proposed that this test be used for large-scale screening of children. Assume that 300,000 children are to be tested, of whom 8 have the disease. Pr(x<=6)= 1-pr(x= 8)-pr(x=7)= 1-0. 0576-0. 1977= 0. 7447 0. 74: heights of a certain population of com plants follow a normal distribution with mean.
