proportion. b) Is finding an interval estimate an example of inferential or descriptive statistics? Explain. It is an interval estimate is an example of inferential statistics‚ as an estimate of the value of the population parameter is made based on sample statistics. c) An interval estimate (23.8‚ 30.6) is determined for the mean age of NSCC students. Identify the point estimate and the margin of error of the interval estimate. The point estimate=27.2 and the margin of error=3.4 d) The proportion
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1. A radio station that plays classical music has a “By Request” program each Saturday night. The percentage of requests for composers on a particular night are listed below: Composers Percentage of Requests Bach 5 Beethoven 26 Brahms 9 Dvorak 2 Mendelssohn 3 Mozart 21 Schubert 12 Schumann 7 Tchaikovsky 14 Wagner 1 a. Does the data listed above comprise a valid probability distribution? Explain.
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out-of-specification items (in a batch of arbitrary size) can be shipped to a customer. Depending on the type of sampling plan being utilized by the company‚ there could be more than one decision rule in effect (for double or multiple plans). Sampling plans utilizing can be single‚ double‚ or multiple. Single sampling plan consists of a sample size n and an acceptance number c. The lot is rejected if there is more than c defective for the sample size. INTRODUCTION Acceptance Quality Control
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References: Is Costco Really the ’Anti-Walmart ’?. (2013). Retrieved from http://www.ethicalshopping.com/ CliffsNotes. (2011). One-Sample t-test. Retrieved from http://www.cliffsnotes.com/study_guide/One-Sample-t-test.topicArticleId- Series in Operations and Decision Sciences. P.394 Cornell University. (2013). What to report?. Retrieved from http://What to report? Retrieved from http://www.csic.cornell.edu/Elrod/t-test/reporting-t-test
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question: someone takes a sample from a population and finds both the sample mean and the sample standard deviation. What can he learn from this sample mean about the population mean? This is an important problem and is addressed by the Central Limit Theorem. For now‚ let us not bother about what this theorem states but we will look at how it could help us in answering our question. The Central Limit Theorem tells us that if we take very many samples the means of all these samples will lie in an interval
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While Statistics can also be misused in many ways such as using not representative samples‚ small sample size‚ ambiguous averages and dispersions‚ detached facts‚ implied connections‚ wrong and misleading graphs‚ wrong use of statistical techniques‚ serious violation of assumption behind the statistical techniques and faculty surveys‚ we should also realize that Statistical literacy is not a skill that is widely accepted as necessary in education. Therefore a lot of misuse of statistics
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was greater than 0.05‚ therefore the expected null hypothesis was accepted. Since our collected data proved the mendelian hypothesis‚ it didn’t matter if the sample was large or small. 3B) Table two of this data was had much smaller sample size and was used to examine the same hull hypothesis as the first table which had much larger sample size. The hypothesis s was the same‚ which was to prove that the phenotype conforms the mendelian expectation. When we calculated the chi-square for this set of
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newspaper article from AIU library’s full-text database: National Newspapers (Proquest)‚ create a lecture (with citations) which includes the following: •Describe an entertainment poll or survey. Analyze the number of people who participated in the sample compared to the number in the population. Most news articles will not provide information on the number of people surveyed. In this case critique the validity of the results. (Be sure to cite the article which must be from National Newspapers -ProQuest)
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unlike in most content analysis‚ only one coder viewed the sample and coded data. Bias may exist on the part of the coder‚ and there is no inter-coder reliability for this study. Furthermore‚ a small sample size was used not only in terms of the episodes chosen‚ but the number of shows overall; only four different animated programs were coded in this analysis‚ for a total of eight episodes. Another consequence of the small sample size is that the two episodes sampled from each show may not be representative
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sExam Quantitative Research Methods I‚ IB&M‚ 2011-2012 Friday‚ April 27th ‚ 2012‚ 9:00-12:00 hours. Name: Student number: Each correctly answered multiple choice question yields 3 points. The remaining 55 points are alotted to the essay question. The last question of this exam is on page 12. Regarding the multiple choice questions: Use the scrap form. Please mark the box associated with the answer you deem to be correct. Do not forget to write your name on the scrap form and mark the
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