{"id":15153,"date":"2021-07-12T20:30:40","date_gmt":"2021-07-12T20:30:40","guid":{"rendered":"https:\/\/papersspot.com\/blog\/2021\/07\/12\/a-trucking-firm-suspects-that-the-mean-life-of-a-certain-tireit-uses-is-essay\/"},"modified":"2021-07-12T20:30:40","modified_gmt":"2021-07-12T20:30:40","slug":"a-trucking-firm-suspects-that-the-mean-life-of-a-certain-tireit-uses-is-essay","status":"publish","type":"post","link":"https:\/\/papersspot.com\/blog\/2021\/07\/12\/a-trucking-firm-suspects-that-the-mean-life-of-a-certain-tireit-uses-is-essay\/","title":{"rendered":"A trucking firm suspects that the mean life of a certain tire\nit uses is Essay"},"content":{"rendered":"<p>A trucking firm suspects that the mean life of a certain tire<br \/> it uses is less than the advertised 45,000 miles.\u00a0 To check the claim, the<br \/> firm randomly selects and tests 22 of these tires and gets a sample mean<br \/> lifetime of 44,350 miles with standard deviation of 1200 miles.\u00a0<br \/> \u00a0 \u00a0 \u00a0a) The sample mean is 44,350.\u00a0 Before doing any work,<br \/> what is gut feeling about the chances of the population mean being less than or<br \/> equal to 45,000?\u00a0 Do you think that the sample mean of 44,350 is low<br \/> enough and provides enough evidence? <\/p>\n<p> \u00a0\u00a0\u00a0\u00a0<br \/> b)\u00a0 Which will you use to perform the hypothesis test, a z-test or t-test?\u00a0<br \/> Explain why. <\/p>\n<p> \u00a0 \u00a0 \u00a0c)<br \/> At \u03b1 = 0.01, test the advertisement\u2019s claim.\u00a0 <\/p>\n<p> \u00a0 \u00a0 \u00a0d) Complete the hypothesis test and compare with your guess<br \/> in part a. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>A trucking firm suspects that the mean life of a certain tire it uses is less than the advertised 45,000 miles.\u00a0 To check the claim, the firm randomly selects and tests 22 of these tires and gets a sample mean lifetime of 44,350 miles with standard deviation of 1200 miles.\u00a0 \u00a0 \u00a0 \u00a0a) The sample [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[33],"class_list":["post-15153","post","type-post","status-publish","format-standard","hentry","category-research-paper-writing","tag-mathematics"],"_links":{"self":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts\/15153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/comments?post=15153"}],"version-history":[{"count":0,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts\/15153\/revisions"}],"wp:attachment":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/media?parent=15153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/categories?post=15153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/tags?post=15153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}