deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean loss to be 9 pounds. At the .05 level of significance‚ can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p-value. Answer: H0: = 10 pounds H1: < 10 pounds Reject the null hypothesis if Z < -1.65 9.0 – 10.00 Z= ---------------- = -2.53 2.8/sqrt(50) The null hypothesis is rejected‚ the average weight
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applied to Walmart‚ we can determine that the Buyer Power of their customers is high because patrons have many other choices. However‚ customers expect and demand the lowest prices from Walmart‚ and they are willing to overlook‚ but not ignore‚ other factors like customer service‚ store location‚ and atmosphere Walmart’s Suppliers have little power because of the sheer size of Walmart‚ and because being a Walmart supplier can provide huge sales potential. The suppliers must do what Walmart wants regarding
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step 2: The hypothesis Answer the following questions: * What is a hypothesis? * How is a hypothesis different from a theory in science? * Describe an example of how you may use the scientific method in your daily life and state a good hypothesis for that example. * Which hypothesis did you first pick in the "Recognizing a good hypothesis" activity in the scientific method tutorial? Why? If any‚ which mistake(s) did you make when picking a hypothesis? A hypothesis is a specific
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STATISTICS PROJECT: Hypothesis Testing See my comments in red. Scoring last page. INTRODUCTION My topic is the average tuition cost of a 4-yr. public college. Since I will soon be transferring to a 4-yr. college‚ I thought this topic would be perfect. "The College Board" says that the average tuition cost of college is $5836 per year. I will be researching online the costs of different public colleges to test this claim. I will be using the T-test for a mean‚ since my sample is going to be less
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enter the Real estate data (text book data set 1) into SPSS and then select a sample of size‚ n = last two digits of your ID and answer the exercises. I. Select an appropriate class interval and organize the “Selling price” into a frequency distribution. II. Compute the Mean‚ Median‚ Mode‚ Standard Deviation‚ Variance‚ Quartiles‚ 9th Decile‚ 10th Percentile and Range of “Selling price” from the raw data of your sample and interpret. III. Develop a histogram (Using question “1”) for the variable
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1. Walmart’s overall approach in achieving sustainable growth: Walmart was renowned throughout the world for its pioneering supply chain practices and it’s insatiable thirst for investing in resources that would help it further cut on its costs and thereby add to its competitive advantage. However‚ sustainable growth as a means of leveraging profitability was not on the company agenda till 2004. Prior to that Walmart had always maintained a defensive position regarding environmental issues. However
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significant at the 5% level using-a one-sided test or using a two-sided test? 3. Agricultural researchers at K-State sometimes study how diets affect the weight gain of animals. Suppose a standard diet gives an average weight gain of 20 lbs.‚ and we would like to know whether or not a new diet gives a greater average weight gain than this. We test H0: population mean = 20 versus Ha: population mean > 20. a. In one study‚ we have a random sample of 30 animals. The sample mean is 22 and the standard
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T-test A t-test is a hypothesis test in which the test statistic follows a Student’s t-distribution under the null hypothesis. There are several different test statistics that fall into the category of a t-test. One-Sample t-test x 0 s n df n 1 t Independent Two-Sample t-test t x1 x2 2 sx1x2 n 1 2 2 sx1 sx2 2 df 2n 2 sx1x2 Unequal Sample Size Two-Sample t-test t x1 x2 1 1 sx1x2 n1 n2 sx1x2 n1 1 sx2 n2
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Group 7 MOTION PICTURES INDUSTRY- CASE STUDY The data collected for a sample of 100 motion pictures produced in 2005 is given below. A survey is carried out to analyze how different variables of the Motion Picture Industry contribute to the success of its motion pictures. The study focuses on four major variables‚ Opening Gross Sales‚ Total Gross Sales‚ Number of Theatres and weeks in top 60. Motion Picture Opening Gross Sales( $millions) Total Gross Sales ($ millions) Number of Theaters
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Walmart One stop shop and low prices for all‚ Walmarts expanding company is a great system that has developed through-out the world. But is this completely true? Values and oppotunies of other "mom and pop shops" have lowered due to Walmarts sucess. There are pros and cons on walmart that i personally agree with both ways. Walmart can be very efficient but its efficiency takes jobs away from people as fast as it supplies people with jobs. July 2‚ 1962 in Rogers Arkansas‚ Sam Walton opend up what
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