Almost all smart devices (phones, tablets, and computers) are made with touch screens. A concern of many consumers is the shelf life of the \"touch\" component of the screens. A consumer advocacy group wanted to inform its members of a range that they can expect their touch screens to last. The group took a sample of21 screens and measured the life of the \"touch\" function of the screens. That is, they used digital devices to simulate billions of touches to determine the life of the screens. Of the 21 screens sampled, the average \"touch\" life was80 months with a standard deviation ofeight months. Constructa98% confidence interval for the standard deviation of the life of the touch screens. Assume that the life of the touch screens has an approximately normal distribution.Round any intermediate calculations to no less than six decimal places and round the endpoints of the interval to four decimal places.<\/p>
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<\/p>", "transcribed_text": "", "related_book": { "title": "Fundamentals Of Statistics", "isbn": "978-032184460, 032183870X, 321844602, 9780321838704, 978-0321844606", "edition": "4th Edition", "authors": "Michael Sullivan III", "cover_image": "https:\/\/dsd5zvtm8ll6.cloudfront.net\/si.question.images\/book_images\/445.jpg", "uri": "\/textbooks\/fundamentals-of-statistics-4th-edition-445", "see_more_uri": "" }, "free_related_book": { "isbn": "1607432390", "uri": "\/textbooks\/the-key-poses-of-yoga-scientific-keys-volume-ii-3rd-edition-978-1607432395-302033", "name": "The Key Poses Of Yoga Scientific Keys Volume Ii", "edition": "3rd Edition" }, "question_posted": "2024-06-28 08:55:24", "see_more_questions_link": "\/study-help\/questions\/sciences-statistics-2024-March-08", "step_by_step_answer": "The Answer is in the image, click to view ...", "students_also_viewed": [ { "url": "\/kc-corporation-manufactures-an-airfreshening-device-called-goodair-which-it", "description": "KC Corporation manufactures an air-freshening device called GoodAir, which it sells to six merchandising firms. The list price of a GoodAir is $ 30, and the full manufacturing costs are $ 18....", "stars": 3 }, { "url": "\/study-help\/psychology\/if-you-could-change-something-about-the-program-what-would-1980804", "description": "If you could change something about the program, what would that be and why?", "stars": 3 }, { "url": "\/bank-management-printers-inc-produces-luxury-chequebooks-with-three-cheques", "description": "Bank Management Printers Inc. produces luxury chequebooks with three cheques and stubs per page. Each chequebook is designed for an individual customer and is ordered through the customers bank. The...", "stars": 3 }, { "url": "\/study-help\/questions\/problem-1-0-2-6-static-you-9885847", "description": "Problem 1 0 - 2 6 ( Static ) You are the newly appointed assistant administrator at a local hospital, and your first project is to investigate the quality of the patient meals put out by the food -...", "stars": 3 }, { "url": "\/study-help\/questions\/explain-what-is-your-opinion-of-the-courts-decision-in-2950958", "description": "Explain what is your opinion of the Court's decision in Palsgraf v . Long Island R.R. Co., Ct. of App. of N.Y., 248 N.Y. 339, 162 N.E. 99 (N.Y. 1928).", "stars": 3 }, { "url": "\/study-help\/questions\/the-bonggang-bonggang-bang-bang-shop-makes-three-basic-types-3521674", "description": "The Bonggang Bonggang Bang Bang Shop makes three basic types of noisemakers: Beng, Bang, and Bong. A Beng can be made in 30 minutes and has a feather attached to it. A Bang requires 15 minutes, has...", "stars": 3 }, { "url": "\/study-help\/questions\/question-8-refer-to-step-33-in-the-constrained-3505267", "description": "Question 8 Refer to Step 3.3. In the \"Constrained \" or \"Long Only\" version of the optimal risky portfolio , what is the portlolio standard deviation ? Write your answer as a percentage , with no...", "stars": 3 }, { "url": "\/study-help\/questions\/answer-the-following-question-with-detail-explanation-including-example-of-1004208", "description": "Answer the following question with detail explanation including example of experience of utilizing concurrent engineering in a development process. What were some of the roadblocks encountered in the...", "stars": 3 }, { "url": "\/study-help\/questions\/management-at-the-terrain-corporation-is-implementing-a-new-justintime-3511912", "description": "Management at the Terrain Corporation is implementing a new just-in-time production system to achieve and maintain low inventory levels. This will help the company to reduce costs and increase...", "stars": 3 }, { "url": "\/study-help\/questions\/riskneutral-probabilities-are-always-select-one-o-equal-to-atomic-2945304", "description": "Risk-neutral probabilities are always Select one: O equal to atomic prices O less than physical probabilities O equal to forward atomic prices O negative O equal to physical probabilities", "stars": 3 } ], "next_back_navigation": { "previous": "\/study-help\/questions\/ez-loan-co-makes-loans-to-high-risk-borrowers-ez-4278420", "next": "\/study-help\/questions\/a-hiking-trail-down-the-side-of-mt-dale-drops-4278422" }, "breadcrumbs": [ { "name": "Study help", "link": "https:\/\/www.solutioninn.com\/study-help\/questions-and-answers" }, { "name": "Sciences", "link": "https:\/\/www.solutioninn.com\/study-help\/questions-and-answers\/sciences" }, { "name": "Mathematics", "link": "https:\/\/www.solutioninn.com\/study-help\/questions\/sciences-mathematics" }, { "name": "Almost all smart devices (phones, tablets, and computers) are made with touch", "link": "https:\/\/www.solutioninn.com\/study-help\/questions\/almost-all-smart-devices-phones-tablets-and-computers-are-made-4278421" } ], "skill_details": { "skill_id": "342", "skill_name": "Mathematics", "parent_id": "5" } }" } }