client to analyze their manufacturing process. The client came to Quality Associates with a sample of 800 observations that they had collected during times when the manufacturing process was running smoothly. The sample of 800 yielded a sample standard deviation of 0.21. Quality Associates suggested that the company periodically take a sample of 30 to monitor their process on an ongoing basis to quickly learn if process was operating at a satisfactory level‚ and if not it could quickly be adjusted
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vice presidents of marketing in the manufacturing sectors viewing pricing as the most important marketing area. 3. A professor of finance has administrated a standard examination to his students in an introductory course over a period of several years. He has found that the scores follow with mean 75.2 and standard deviation 10.4. The professor takes a years leave of absence to teach at another university‚ where‚ at the end of his course‚ he administers the same examination to 20 students
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Question 1 a. Mean age = 960/20=48 b. Standard Deviation = 10.74832 Web address: http://easycalculation.com/statistics/standard-deviation.php Frequency distribution table for denomination. Score f(frequency) 1 1 2 2 4 2 5 1 6 3 7 3 8 1 9 3 10 3 12 1 N=30 c. What is the percentage of people who identify themselves as Baptist? 3/20 = .15 x 100 = 15% What is the mode of church attendance? 5 Question
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types of z test that will be taken up. Lesson 1: z-test of Hypothesis about a Population Mean Before the z-one population test of hypothesis about a population mean is applied‚ certain assumptions must be met: (1) The (population standard deviation) is known. (2) The data are either interval or ratio. (3) Only one group is specified. (4) The distributions of the scores follow the normal distribution. A special table called the z-table is used to facilitate the
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05 | a. Compute the expected values for the random variables x and y. (2 marks) b. Compute the standard deviations for the random variables x and y. (3 marks) c. Compute the coefficient of variation for each random variable. (2 marks) d. Referring to part c‚ suppose the seminar director said that the first stock was riskier since its standard deviation was greater than the standard deviation of the second stock. How would you respond to her assertion? (3 marks) Solution 1: In the first
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of two investments Answer: CV1 0.10 0.15 0.6667 CV2 0.05 0.12 0.4167 Based solely on standard deviations‚ Investment 2 has lower risk than Investment 1. Based on coefficients of variation‚ Investment 2 is still less risky than Investment 1. Since the two investments have different expected returns‚ using the coefficient of variation to assess risk is better than simply comparing standard deviations because the coefficient of variation considers the relative size of the expected returns of
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Table of Contents 1.1 plan for the collection of primary and secondary data In order to understand the response or view of the customers about the store‚ primary and secondary data needed for Shark Spin are as follows: Primary Data: In order to do whatever survey needs to be conducted is known as primary data (Bpp‚ 2004‚ p7). Survey can be done to investigate Customer’s response information. What customers expect from the firm. What they think needs to be
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lender formal proof of the obligation‚ for collection of debt purposes‚ and to require the borrower to pay interest 5. Which of the following statements about ethical behavior in business is true? Answer: The legal environment sets the maximum standards of ethical behavior. 6. A __________ is an articulation of a simple criterion or characterization of what the leader sees the company must become to establish and sustain global leadership. Answer: Leaders Vision 7. Woodstock Inc. expects to own
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understand the relationships between our variables. Descriptive Statistics on Net Sales: Net Sales (All Customers) Mean Median Mode Range Standard Deviation Coefficient of Variation $77.60 $59.71 $31.60 274.36 55.66 71.73 Descriptive Statistics on Net Sales by Various Classifications of Customers: Mean Median Mode Range Standard Deviation Coefficient of Variation PELICAN STORES Net Sales by Customer Type Married Single Regular Promotion $78.03 $75.35 $61.99 $84.29
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Chapter 10 31. A new weight-watching company‚ Weight Reducers International‚ advertises that those who join will lose‚ on the average‚ 10 pounds the first two weeks with a standard 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
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