tailieunhanh - Ebook Elementary statistics (11E): Part 2

(BQ) Part 2 book "Elementary statistics" has contents: Hypothesis testing, inferences from two samples, correlation and regression, goodness of fit and contingency tables, goodness of fit and contingency tables, nonparametric statistics, projects, procedures, perspectives, statistical process control. | Find more at 8-1 Review and Preview 8-2 Basics of Hypothesis Testing 8-3 Testing a Claim About a Proportion 8-4 Testing a Claim About a Mean: s Known 8-5 Testing a Claim About a Mean: s Not Known 8-6 Testing a Claim About a Standard Deviation or Variance Hypothesis Testing 390 Find more at CHAPTER PROBLEM Does the MicroSort method of gender selection increase the likelihood that a baby will be a girl? Gender-selection methods are somewhat controversial. Some people believe that use of such methods should be prohibited, regardless of the reason. Others believe that limited use should be allowed for medical reasons, such as to prevent gender-specific hereditary disorders. For example, some couples carry X-linked recessive genes, so that a male child has a 50% chance of inheriting a serious disorder and a female child has no chance of inheriting the disorder. These couples may want to use a gender-selection method to increase the likelihood of having a baby girl so that none of their children inherit the disorder. Methods of gender selection have been around for many years. In the 1980s, ProCare Industries sold a product called Gender Choice. The product cost only $, but the Food and Drug Administration told the company to stop distributing Gender Choice because there was no evidence to support the claim that it was 80% reliable. The Genetics & IVF Institute developed a newer gender-selection method called MicroSort. The Microsort XSORT method is designed to increase the likelihood of a baby girl, and the YSORT method is designed to increase the likelihood of a boy. Here is a statement from the MicroSort Web site: “The Genetics & IVF Institute is offering couples the ability to increase the chance of having a child of the desired gender to reduce the probability of X-linked diseases or for family balancing.” Stated simply, for a cost exceeding $3000, the Genetics & IVF Institute claims that it can .