Ebook Statistical techniques in business amp; economics (17th edition): Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook Statistical techniques in business amp; economics (17th edition): Part 2
Ebook Statistical techniques in business amp; economics (17th edition): Part 2
Two-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2s Its competitor's. A sample of 40 babies using the Gibbs products revealed a mean weight gain of 7.6 pounds In the first three months after birth. For the Gibbs brand, the population standard deviation of the sample Is 2.3 pounds. A sample of 55 babies using the competitor’s brand revealed a mean i Ebook Statistical techniques in business amp; economics (17th edition): Part 2ncrease in weight of 8.1 pounds. The population standard deviation is 2.9 pounds. At the .05 significance level, can we conclude that babies using theEbook Statistical techniques in business amp; economics (17th edition): Part 2
Gibbs brand gained less weight? (See Exercise 3 and LO11-1.)LEARNING OBJECTIVESWhen you have completed this chapter, you will he able to:LO11-1 Test Two-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2hesis that two independent population means are equal, with unknown population standard deviations.LO11-3 Test a hypothesis about the mean population difference between paired or dependent observations.LO11-4 Explain the difference between dependent and independent samples.www.downloadslide.com354CH Ebook Statistical techniques in business amp; economics (17th edition): Part 2APTER 11INTRODUCTIONChapter 10 began our study of hypothesis testing. We described the nature of hypothesis testing and conducted tests of a hypothesiEbook Statistical techniques in business amp; economics (17th edition): Part 2
s In which we compared the results of a single sample to a population value. That Is, we selected a single random sample from a population and conductTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2r week at Jamestown Steel Company to determine whether there was a change;. Jofm I u-aurew KctyiHInnd Mngc& newin the production rate. Similarly, we sampled the cost to process insurance claims to determine if cost-cutting measures resulted in a mean less than the current $60 per claim. In both case Ebook Statistical techniques in business amp; economics (17th edition): Part 2s, we compared the results of a single sample statistic to a population parameter.In this chapter, we expand the Idea of hypothesis testing to two popEbook Statistical techniques in business amp; economics (17th edition): Part 2
ulations. That Is. we select random samples from two dif ferent populations to determine whether the population means are equal. Some questions we migTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2bil Software. Inc., do customer service employees receive more calls for assistance during the morning or afternoon?3in the fast food Industry. IS there a difference in the mean number of days absent be tween young workers (under 21 years of age) and older workers (more than 60 years Of age)?4Is the Ebook Statistical techniques in business amp; economics (17th edition): Part 2re an increase in the production rate If music Is piped Into the production area?We begin this chapter with the case In which we select random samplesEbook Statistical techniques in business amp; economics (17th edition): Part 2
from two independent populations and wish to investigate whether these populations have the same mean.LLỈU1Test a hypothesis that two Independent popTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2y planner in Tampa, Florida wishes to know whether there is a difference in the mean hourly wage rate of plumbers and electricians in central Florida. A financial accountant wishes to know whether the mean rate of return for domestic, U.S., mutual funds is different from the mean rate of return on g Ebook Statistical techniques in business amp; economics (17th edition): Part 2lobal mutual funds. In each of these cases, there are two independent populations. In the first case, the plumbers represent one population and the elEbook Statistical techniques in business amp; economics (17th edition): Part 2
ectricians, the other. In the second case, domestic. U.S.. mutual funds are one population and global mutual funds, the other.To Investigate the questTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2are the same, that Is. the mean hourly rate is the same for the plumbers and the electricians, we would expect the difference between the two sample means to be zero. But what if our sample results yield a difference other than zero? Is that difference due to chance or is it because there is a real Ebook Statistical techniques in business amp; economics (17th edition): Part 2difference in the hourly earnings? A two-sample test of means will help to answer this question.Return to the results of Chapter 8. Recall that we shoEbook Statistical techniques in business amp; economics (17th edition): Part 2
wed that a distribution of sample means would tend to approximate the normal distribution. We need to again assume that a distribution of sample meansTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2 differences between sample means for two normal distributions is also normal.We can Illustrate this theory In terms of the city planner In Tampa. Florida. To begin, let's assume some Information that Is not usually available. Suppose that the population of plumbers has a mean of $30.00 per hour and Ebook Statistical techniques in business amp; economics (17th edition): Part 2 a standard deviation of $5.00 per hour. The population of electricians has a mean of $29.00 and a standard deviation of $4.50. Nov/, from this InformEbook Statistical techniques in business amp; economics (17th edition): Part 2
ation It Is clear that the two population means are not the same. The plumbers actually cam $1.00 per hour more than the electricians. But we cannot eTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versus Ebook Statistical techniques in business amp; economics (17th edition): Part 2ectricians and compute the mean of each sample. Then, we determine the difference between the sample means. It is this difference between the sample means that holds our interest. If the populations have the same mean, then we would expect the difference between the two sample means to be zero. If t Ebook Statistical techniques in business amp; economics (17th edition): Part 2here is a difference between Ore population means, then we expect to find a difference between the sample means.Two-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versusTwo-Sam pie Tests of Hypothesis11c JCliBend liiwrs LLC Rr▲ GIBBS BABY FOOD COMPANY wishes to compare the weight gain of Infants using Its brand versusGọi ngay
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