Confidence Intervals and Hypothesis Testing Name: Math 256‚ Nelson 1. A soft-drink machine is regulated so that the amount of drink dispensed is approximately normally distributed with a standard deviation equal to 1.5 deciliters. Find a 95% confidence interval for the mean of all drinks dispensed by this machine if a random sample of 36 drinks had an average content of 2.25 dl. 2. The heights of a random sample of 50 college students showed a mean of 174.5 centimeters. Assume the
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to determine the feasibility of providing a dental insurance plan. A random sample of 12 employees reveals the following family dental expenses (in dollars): 115‚ 370‚ 250‚ 593‚ 540‚ 225‚ 177‚ 425‚ 318‚ 182‚ 275‚ and 228. Construct a 90% confidence interval estimate for the standard deviation of family dental expenses for all employees of this corporation. Place your LOWER limit‚ in dollars rounded to 1 decimal place‚ in the first blank. Do not use a dollar sign‚ a comma‚ or any other stray mark
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NORTHCENTRAL UNIVERSITY ASSIGNMENT COVER SHEET Student: Emanuel Parker THIS FORM MUST BE COMPLETELY FILLED IN Follow these procedures: If requested by your instructor‚ please include an assignment cover sheet. This will become the first page of your assignment. In addition‚ your assignment header should include your last name‚ first initial‚ course code‚ dash‚ and assignment number. This should be left justified‚ with the page number right justified. For example: |DoeJXXX0000-1
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Limit Theorem Law of Large Numbers Confidence Level (1- )*100 Type I error (rejecting the null hypothesis when in fact it is true) Type II error (not rejecting the null hypothesis when in fact the null is not true) What is true What you did Do not Reject H0 Reject H0 H0 true No Error Type I error Ha True Type II Error No Error 15. Level of Significance (The probability of making a Type I error) 16. Interpretation of a confidence interval 17. P-value a. The probability
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harvard A Newsletter from Harvard Business School Publishing management update ARTICLE REPRINT NO. U0603C The Use and Misuse of Statistics For a complete list of Harvard Business School Publishing newsletters: http://newsletters.harvardbusinessonline.org For reprint and subscription information for Harvard Management Update: Call 800-988-0866 or 617-783-7500 http://hmu.harvardbusinessonline.org For customized and quantity orders of reprints: Call 617-783-7626 Fax 617-783-7658
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The Final Project is worth 105 points. Please download this document to your computer and save it using the naming convention specified in the course syllabus. For the Final Project you will be using the MM207 Student Data Set‚ the survey codebook‚ and StatCrunch as necessary. You should enter your answers/responses directly after the question. There is no need to retype the project. After completing and saving the project‚ submit your project in the Final Drop Box. In the course‚ go to Unit
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Gulf Real Estate Properties Gulf Real Estate Properties‚ Inc.‚ is a real estate firm located in southwest Florida. The company‚ which advertises itself as “expert in the real estate market‚” monitors condominium sales by collecting data on location‚ list price‚ sale price‚ and number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico or No Gulf View if it is located on the bay or a golf course‚ near but not on the Gulf
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subjected to distance tests. According to the data‚ we got the information we need for a hypothesis test as follow: | Current | New | Means | 269.42 | 266.67 | Count | 40 | 40 | Standard Deviation | 8.09 | 9.79 | Confidence Level(95.0%) | 2.59 | 3.13 | | | | The 40 simple of both current and new model golf balls show that the average distance of the new ball drive is less than the current model‚ but the standard deviation of new ball is 9.79 which is larger
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concluded that there was a total of 446.1 ounces of soda measured from 30 bottles with an average (Mean) of 14.87 ounces of soda per bottle‚ with a mode of 14.8. The calculated standard deviation is 0.550329 Now we have to construct a 95% confidence interval for the average amount of 16 ounce bottles produced by the company. C= 95%‚ and a = 0.05‚ n= 30 for sample size. Using the calculator when came of the values +1.96 and -1.96. To come up with me margin of error‚ we multiply 1.96 by the standard
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In today’s world‚ we are faced with situations everyday where Statistics can be applied. In general‚ Statistics is the science of collecting‚ organizing‚ and analyzing numerical data. The techniques involved in Statistics are important for the work of many professions‚ thus the proper preparation and theoretical background of Statistics is valuable for many successful career paths. Marketing campaigns‚ the realm of gambling‚ professional sports‚ the world of business and economics‚ the political
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