Ebook Elementary statistics (11E): Part 2
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Ebook Elementary statistics (11E): Part 2
8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2aim About a Mean: Ơ Not Known8-6 Testing a Claim About a Standard Deviation or VarianceHypothesis Testing390Does 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 metho Ebook Elementary statistics (11E): Part 2ds should be prohibited, regardless of the reason, others believe that limited use should be allowed for medical reasons, such as to prevent gender-spEbook Elementary statistics (11E): Part 2
ecific hereditary disorders. For example, some couples carry X-linked recessive genes, so that a male child has a 50% chance of inheriting a serious d8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2od 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 !98Os. ProCare Industries sold a product called Gender Choice. The product cost only $49.95. but the Food and Drug Administration told the company to stop Ebook Elementary statistics (11E): Part 2distributing Gender Choice because there was no evidence to support the claim that it was 80% reliable.The Genetics  IVF Institute developed a newerEbook Elementary statistics (11E): Part 2
gender-selection method called MicroSort. The Microsori XSORI method IS designed to increase the likelihood of a babygirl, and the YSORT method is des8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2ity 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. lite Genetics & IVF Institute claims that It can increase tlK' probability of having a baby of the gender that a coup Ebook Elementary statistics (11E): Part 2le prefers. As of this writing, the MicroSort method is undergoing clinical trials, but these results are available: Among 726 couples who used the XSEbook Elementary statistics (11E): Part 2
ORI method in trying to have a baby girl. 668 couples did have baby girls, for a success rate of 92.0%. Under normal circumstances with no special tre8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2 provide US with an interesting question: Given that 668 out of 726 couples had girls, can we actually support the claim that the XSORT technique IS effective in increasing the probability of a girl? Do we now have an effective method of gender selection?Find more at www.downloadslide.com 392Chapter Ebook Elementary statistics (11E): Part 2 8 Hypothesis TestingReview and PreviewIn Chapters 2 and 3 we used “descriptive statistics” when we summarized data using tools such .-IS graphs, andEbook Elementary statistics (11E): Part 2
statistics such as the mean and standard deviation. Methods of inferential statistics use sample data to make an inference or conclusion about a popul8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2 parameter with a confidence interval), and (2) test a hypothesis or claim about a population parameter. In Chapter 7 we presented methods for estimating a population parameter with a confidence interval, and in this chapter we present the method of hypothesis testing.■ ■ ■■ ■■11’In statistics, a hy Ebook Elementary statistics (11E): Part 2pothesis is a claim or statement about a property ola population.A hypothesis test (or test of significance) is a procedure for testing a claim aboutEbook Elementary statistics (11E): Part 2
a property of a population.The main objective of this chapter is to develop the ability to conduct hypothesis tests for claims made about a population8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2evelop in this chapter:•Genetics The Generics ỔÍ IVF Institute claims that irs XSOR I method allows couples to increase the probability of having a baby girl.•Business A newspaper headline makes the claim that most workers gel their jobs through networking.•Medicine Medical researchers claim that wh Ebook Elementary statistics (11E): Part 2en people with colds are rreared with echinacea, rhe treatment has no effect.•Aircraft Safety The Federal Aviation Administration claims that the meanEbook Elementary statistics (11E): Part 2
weight of an airline passenger (including carry-on baggage) is greater than 185 lb, which it was 20 years ago.•Quality Control When new equipment is 8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2nsistent. (In many industries, rhe quality of goods and services can often be improved by reducing variation.)rhe formal method of hypothesis resting uses several standard terms and conditions in a systematic procedure.Study Hint: Start by clearly understanding Example I in Section 8-2, then read Se Ebook Elementary statistics (11E): Part 2ctions 8-2 and 8-3 casually to obtain a general idea of their concepts, then study Section 8-2 more carefully to become familiar with the terminology.Ebook Elementary statistics (11E): Part 2
CAUTIONWhen conducting hypothesis tests as described in this chapter and the following chapters. instead of jumping directly to procedures and calcula8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla Ebook Elementary statistics (11E): Part 2Find more at www.downloadslide.com 8-2 Basics of Hypothesis TestingBasics of Hypothesis TestingKey Concept In this section we present individual components of a hypothesis test. In Part I wc discuss the basic concepts of hypothesis testing. Because these concepts arc used in the following sections a Ebook Elementary statistics (11E): Part 2nd chapters, we should know and understand the following:•I low to identify rhe null hypothesis and alternative hypothesis from a given claim, and howEbook Elementary statistics (11E): Part 2
to express both in symbolic form•How to calculate the value of the lest statistic, given a claim and sample data8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a Cla8-1 Review and Preview8-2 Basics of Hypothesis Testing8-5 Testing a Claim About a Proportion8-4 Testing a Claim About a Mean: Ơ Known8-5 Testing a ClaGọi ngay
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