{"id":3577,"date":"2020-11-10T13:12:14","date_gmt":"2020-11-10T13:12:14","guid":{"rendered":"http:\/\/onlineclassesguru.com\/?p=3577"},"modified":"2020-11-10T13:13:00","modified_gmt":"2020-11-10T13:13:00","slug":"mean-of-quality-control-department","status":"publish","type":"post","link":"https:\/\/onlineclassesguru.com\/index.php\/2020\/11\/10\/mean-of-quality-control-department\/","title":{"rendered":"Mean of Quality Control Department"},"content":{"rendered":"<style type=\"text\/css\"><\/style><p>1-) A quality control department noted took a sample of 40 product, and found the mean number of defect to be 6.15, with a standard deviation of 2.53 . The distribution was known to be normal. Construct a 95 percent confidence interval for the mean number of defects 2-) A corporation is trying to estimate the mean amount an employee\u2019s spends on dental care. They survey 45 employees, and find a mean amount spent of $1820, with a sample std dev of $660. Find a 95% confidence interval for the mean amount spent 3-) Pepsi wants to estimate an average number of cans of Pepsi consumed. The sample 16 people and find the mean number of cans to be 60 with a sample standard deviation of cans of 20 a. Is the t or z distribution used here? Why? b. What is the value of the test statistic to be used for a 90% confidence interval? c. Create a 90% confidence interval. d. Could Pepsi be reasonable in concluding that the population mean is 59 cans? 4-) Last year a survey showed that 30% of travelers stay in budget hotels. The hotel association wants to update this proportion. . a. The new study is to use the 90 percent confidence level. The estimate is to be within 1 percent of the population proportion. What is the necessary sample size? b. If we wanted to reduce the required sample size, what could we do? 5-) A survey of singles was made regarding their restaurant eating habits. A sample of 60 singles had a sample mean number of restaurant visits was 2.76 meals per week. The std deviation of the sample was 0.75 meals per week. Create a 98 percent confidence interval for the mean of the population.<\/p>\n<p><center><a href=\"http:\/\/onlineclassesguru.com\/orders\/ordernow\"><img decoding=\"async\" src=\"https:\/\/encrypted-tbn0.gstatic.com\/images?q=tbn:ANd9GcTyj99p60XCLyLk1htB7-1neRt8-2QdnenNlQ&usqp=CAU\"target=\"_http:\/\/onlineclassesguru.com\/orders\/ordernow\"\/><\/center><p>","protected":false},"excerpt":{"rendered":"<p>1-) A quality control department noted took a sample of 40 product, and found the mean number of defect to be 6.15, with a standard deviation of 2.53 . The distribution was known to be normal. Construct a 95 percent confidence interval for the mean number of defects 2-) A corporation is trying to estimate&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3577","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mean of Quality Control Department - onlineclassesguru<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/onlineclassesguru.com\/index.php\/2020\/11\/10\/mean-of-quality-control-department\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mean of Quality Control Department - onlineclassesguru\" \/>\n<meta property=\"og:description\" content=\"1-) A quality control department noted took a sample of 40 product, and found the mean number of defect to be 6.15, with a standard deviation of 2.53 . 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