Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2
Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2
After completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypothese Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 es.□Find critical values for the z test.□State the five steps used in hypothesis testing.B Test means when a is known, using the / test.□Test means when <7 is unknown, using the I test.Q Test proportions, using the 2 test.EJ Test variances or standard deviations, using the chi-square test.□Test hypo Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 theses, using confidence intervals.E Explain the relationship between type I and type II errors and the power of a test.Introduction8-1 Steps in HypotEbook Elementary statistics: A step by step approach (Eighth edition) - Part 2
hesis Testing—Traditional Method8-2 z Test for a Mean8-3 t Test for a Mean8-4 2 Test for a Proportion8-5 A'2 Test for a Variance or standard DeviationAfter completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypothese Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 su perimendent reads an article which states that the overall mean score for the SAI is 910.1 urthermore. suppose that, for a sample of students, the average of the SAT scores in the superintendent's school district is 960. Can the superintendent conclude that the students in his sctusil district s Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 cored higher on average? Al first glance, you might be inclined to say yes, since 960 is higher than 910. Rut recall that the means of samples vary abEbook Elementary statistics: A step by step approach (Eighth edition) - Part 2
out the population mean when samples are selected from a specific population. So the question arises. Is there a real difference in the means, or is tAfter completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypothese Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 n hypothesis testing. See Statistics Today—Revisited for the answer. In this chapter, you will leam how to answer many questions of this type by using statistics that are explained in the theory of hypothesis testing.IntroductionResearchers are interested in answering many types of questions. 1 or e Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 xample, a scientist might want to know whether the earth is warming up. A physician might want to know whether a new medication will lower a person’sEbook Elementary statistics: A step by step approach (Eighth edition) - Part 2
blood pressure. An educator might wish to see whether a new leaching technique is better than a traditional one. A retail merchant might want to know After completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypothese Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 duce the severity of injuries caused by accidents. These types of questions can be addressed through statistical hypothesis testing, which is a decision-making process for evaluating claims about a population. In hypothesis testing, the researcher must define the population under study, state the pa Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 rticular hypotheses that will be investigated, give the significance level, select a sample from the population, collect the data, perform the calculaEbook Elementary statistics: A step by step approach (Eighth edition) - Part 2
tions required for the statistical lest, and reach a conclusion.Hypotheses concerning parameters such as means and proportions can be investigated. ThAfter completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypothese Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 sting Traditional Method 401and the I test. This chapter will explain in detail the hypothesis-testing procedure along with the z test and the t test. In addition, a hypothesis-testing procedure for testing a single variance or standard deviation using the chi-square distribution is explained in Sec Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 tion 8 5.The three methods used to test hypotheses are1.The traditional method2.The P-value method3.The confidence interval methodThe traditional methEbook Elementary statistics: A step by step approach (Eighth edition) - Part 2
od will be explained first. It has been used since the hypothesistesting method was formulated. A newer method, called the P-value method, has become After completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypothese Ebook Elementary statistics: A step by step approach (Eighth edition) - Part 2 the confidence interval method, is explained in Section 8 (1 and illustrates the relationship between hypothesis testing and confidence intervals.After completing this chapter, you should be able toI Understand the definitions used in hypothesis testing.B State the null and alternative hypotheseGọi ngay
Chat zalo
Facebook