More 19 Confidence Interval Problem Answers AP Statistics Quiz A – Chapter – Key A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students)‚ 35 said they were registered to vote. 1. Find a 95% confidence interval for the true proportion of the professor’s students who were registered to vote. (Make sure to check any necessary conditions and to state a conclusion in the context
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1) Suppose that an independent laboratory has tested trash bags and has found that no 30-gallon bags that are currently on the market have a mean breaking strength of 50 pounds or more. On the basis of these results‚ the producer of the new‚ improved trash bag feels sure that its 30-gallon bag will be the strongest such bag on the market if the new trash bag’s mean breaking strength can be shown to be at least 50 pounds. The mean of the sample of 40 trash bag breaking strengths in Table 1.9 is x=50
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Process Improvement Plan University of Phoenix Dr. Anthony Matias March 24‚ 2011 Abstract The premise of this paper is to identify deficiencies in daily managerial processes by using systematic statistical process controls and make the necessary improvements. The paper will employ various examples and calculations along with supporting data to explain control limits and its importance to the statistical process control. The effects of seasonal factors and its relevance to a process
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Case #9 1. Is it proper to multiply the average order size‚ $42.33‚ by the number of addresses (1‚300‚000) in the target mailing? a. No‚ there is far too much variability in responses‚ including a massive outlier‚ to have any confidence in this average. The response rate is very low‚ one would be concerned as to why the rate of response was only 9.2%. The question would therefore be whether the remaining 90.8% will follow the same pattern or will they buy anything at all. There is also
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Testing a Claim It is possible to test a claim using a confidence interval. The logic is very simple and straightforward. Assume we use StatCrunch to create a 95% confidence interval for the number of Facebook friends for Kaplan University MM207 students and find that the interval is between 75 friends and to 125 friends. Now‚ one of your classmates claims that the average number of Facebook friends is 150. Does this claim make sense in light of your confidence interval? No it does not. If a claim
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Sample Size Calculator Terms: Confidence Interval & Confidence Level The confidence interval (also called margin of error) is the plus-or-minus figure usually reported in newspaper or television opinion poll results. For example‚ if you use a confidence interval of 4 and 47% percent of your sample picks an answer you can be "sure" that if you had asked the question of the entire relevant population between 43% (47-4) and 51% (47+4) would have picked that answer. The confidence level tells you
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Prepare a managerial report for the dean of the college that summarizes your assessment of the nature of cheating by business students at Bayview University. Be sure to include the following questions. 1. Develop 95% confidence intervals for the proportion of all students‚ the proportion of male students‚ and the proportion of female students who were involved in some type of cheating. 2. Conduct a hypothesis test to determine if the proportion of business students at Bayview University who were
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Experiment 2 Finite State Machines September 18th‚ 2013 ECE 211 – Lab 02 Every member of the group has materially contributed to the intellectual content of this report. Introduction This experiment reviewed Finite State Machines (FSMs). We designed and built an FSM using the classical design method. Methods‚ Experimental Details‚ and Equipment Equipment Model Basic Description Function Generator 33220A Provides a voltage/current and allows
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Allocation of Finite Resources within the Typical Not-for-Profit Health Care Organization University of Phoenix Allocation of Finite Resources within the Typical Not-for-Profit Health Care Organization The general philosophy‚ structure‚ and approach of the not-for-profit health care organization‚ as well as its future aspirations are contained in the values‚ mission‚ and vision statements of the organization. Once the typical not-for-profit health care organization has defined its mission
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Exam 1 - Version 1 This is a 50 minute test. 1. Of a group of 100 people‚ 33 like earrings‚ 29 like tattoos‚ and 26 like tattoos but don’t like earrings. How many like neither earrings nor tattoos? (A) 59 (B) 41 (C) 38 (0) 12 (E) none of the others 2. In the diagram belovv‚which of the following is true? C. I (A) x E (A n G’) U (B n G) (0) x E (A n G) U (B’ n G) (B) x E (A U B) n (A’ U G) (E) none of the others n G’) n (B n G) (C) x E (A 3. Two 6-sided dice
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