Ebook Applied statistics - In business and economics (3E): Part 2

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Nội dung chi tiết: Ebook Applied statistics - In business and economics (3E): Part 2

Ebook Applied statistics - In business and economics (3E): Part 2

Find more at www.downloadslide.com10Two-SampleHypothesis TestsChapter Contents10.1Two-Sample Tests10.2Comparing Two Means: Independent Samples10.3Conf

Ebook Applied statistics - In business and economics (3E): Part 2fidence Interval for the Difference of Two Means. - fi210.4Comparing TWO Means: Paired Samples10.5Comparing Two Proportions10.6Confidence Interval for

the Difference of Two Proportions, », - x210.7Comparing Two VariancesChapter LearningObjectivesBE When you finish this chapter you should be able toL Ebook Applied statistics - In business and economics (3E): Part 2

O1 Recognize and perform a test for two means with known Ơ, and a2.LO2 Recognize and perform a test for two means with unknown Ơ, and a2.LO3 Recognize

Ebook Applied statistics - In business and economics (3E): Part 2

paired data and be able to perform a paired t test.LO4 Explain the assumptions underlying the two-sample test of means.LOS Perform a test to compare

Find more at www.downloadslide.com10Two-SampleHypothesis TestsChapter Contents10.1Two-Sample Tests10.2Comparing Two Means: Independent Samples10.3Conf

Ebook Applied statistics - In business and economics (3E): Part 2t.LO8 Carry out a test of two variances using the F distribution109 Construct a confidence interval for <4, - n2 or JT, - ny390The logic and applicati

ons of hypothesis testing that you learned in Chapter 9 will continue here, but now we consider two-sample tests. The two-sample test is used to make Ebook Applied statistics - In business and economics (3E): Part 2

inferences about the two populations from which the samples were drawn. The use of these techniques is widespread in science and engineering as well a

Ebook Applied statistics - In business and economics (3E): Part 2

s social sciences. Drug companies use sophisticated versions called clinical trials to determine the effectiveness of new drugs, agricultural science

Find more at www.downloadslide.com10Two-SampleHypothesis TestsChapter Contents10.1Two-Sample Tests10.2Comparing Two Means: Independent Samples10.3Conf

Ebook Applied statistics - In business and economics (3E): Part 2SAMPLE TESTSWhat Is a Two-Sample Test?TWo-sample tests compare two sample estimates with each other, whereas one-sample tests compare a sample estimat

e with a nonsamplc benchmark (a claim or prior belief about a population parameter). Here are some actual two-sample tests from this chapter:Automotiv Ebook Applied statistics - In business and economics (3E): Part 2

e A new bumper is installed on selected vehicles in a corporate fleet. During a I-year test period, 12 vehicles with the new bumper were involved in a

Ebook Applied statistics - In business and economics (3E): Part 2

ccidents, incurring mean damage of SI. 101 with a standard deviation ofS696. During the same year. 9 vehicles with the old bumpers were involved in ac

Find more at www.downloadslide.com10Two-SampleHypothesis TestsChapter Contents10.1Two-Sample Tests10.2Comparing Two Means: Independent Samples10.3Conf

Ebook Applied statistics - In business and economics (3E): Part 2rketing At a matinee performance of X-Men Origins: Wolverine, a random sample of 25 concession purchases showed a mean of $7.29 with a standard deviat

ion of S3.02. For the evening performance a random sample of 25 concession purchases showed a mean of S7.12 with a standard deviation of $2.14. Is the Ebook Applied statistics - In business and economics (3E): Part 2

re less variation in the evenings?Safety In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test

Ebook Applied statistics - In business and economics (3E): Part 2

period, the fleet of red fire trucks made 153,348 runs and had 20 accidents. while the fleet of yellow fire trucks made 135.035 runs and had 4 acciden

Find more at www.downloadslide.com10Two-SampleHypothesis TestsChapter Contents10.1Two-Sample Tests10.2Comparing Two Means: Independent Samples10.3Conf