{"id":566,"date":"2017-04-15T03:27:39","date_gmt":"2017-04-15T03:27:39","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/conceptstest1\/chapter\/assignment-two-independent-samples\/"},"modified":"2017-05-31T04:16:40","modified_gmt":"2017-05-31T04:16:40","slug":"assignment-two-independent-samples","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/chapter\/assignment-two-independent-samples\/","title":{"raw":"Assignment: Two Independent Samples","rendered":"Assignment: Two Independent Samples"},"content":{"raw":"&nbsp;\r\n\r\nThe purpose of this activity is to give you guided practice in obtaining and interpreting a 95% confidence interval for \u03bc<sub>1<\/sub> \u2212 \u03bc<sub>2<\/sub> following a two-sample T-test that rejected H<sub>0<\/sub>. Recall our second example:\r\n\r\n<img class=\"alignnone\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/1729\/2017\/04\/15032733\/m10_inference_mean_topic_10_4_m10_est_diff_two_pop_means_1_image409.gif\" alt=\"Our variable Age Group (X) has two categories: males 20\u201329 years old and males 75+ years old. These two groups form our two populations. For each population we have a separate \u03bc, representing the weight (Y) mean of that population. For each population we take an SRS. From population 1 of males 20\u201329 years old, we obtain an SRS of size 712, and find that it has a mean of 83.4 and SD of 18.7. From population 2 of males 75+ years old, we take an SRS of size 1001 and find that it has a mean of 78.5 and SD of 19.0.\" width=\"483\" height=\"372\" \/>&nbsp;\r\n<h3>Instructions<\/h3>\r\nClick on the link corresponding to your statistical package to see instructions for completing the activity, and then answer the questions below.\r\n\r\n<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_r0.html\" target=\"new\"> R <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_statcrunch0.html\" target=\"new\"> StatCrunch <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_minitab0.html\" target=\"new\"> Minitab <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_excel0.html\" target=\"new\"> Excel 2007 <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_ti0.html\" target=\"new\"> TI Calculator <\/a>\r\n<h3>Question:<\/h3>\r\nObtain the 95% confidence interval for \u03bc<sub>1<\/sub> - \u03bc<sub>2<\/sub> and interpret it in context.\r\n<h3><\/h3>","rendered":"<p>&nbsp;<\/p>\n<p>The purpose of this activity is to give you guided practice in obtaining and interpreting a 95% confidence interval for \u03bc<sub>1<\/sub> \u2212 \u03bc<sub>2<\/sub> following a two-sample T-test that rejected H<sub>0<\/sub>. Recall our second example:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/1729\/2017\/04\/15032733\/m10_inference_mean_topic_10_4_m10_est_diff_two_pop_means_1_image409.gif\" alt=\"Our variable Age Group (X) has two categories: males 20\u201329 years old and males 75+ years old. These two groups form our two populations. For each population we have a separate \u03bc, representing the weight (Y) mean of that population. For each population we take an SRS. From population 1 of males 20\u201329 years old, we obtain an SRS of size 712, and find that it has a mean of 83.4 and SD of 18.7. From population 2 of males 75+ years old, we take an SRS of size 1001 and find that it has a mean of 78.5 and SD of 19.0.\" width=\"483\" height=\"372\" \/>&nbsp;<\/p>\n<h3>Instructions<\/h3>\n<p>Click on the link corresponding to your statistical package to see instructions for completing the activity, and then answer the questions below.<\/p>\n<p><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_r0.html\" target=\"new\"> R <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_statcrunch0.html\" target=\"new\"> StatCrunch <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_minitab0.html\" target=\"new\"> Minitab <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_excel0.html\" target=\"new\"> Excel 2007 <\/a> | <a href=\"https:\/\/s3-us-west-2.amazonaws.com\/oerfiles\/Concepts+in+Statistics\/assignments\/_u5_m2_lbd3\/_u5_m2_lbd3_ti0.html\" target=\"new\"> TI Calculator <\/a><\/p>\n<h3>Question:<\/h3>\n<p>Obtain the 95% confidence interval for \u03bc<sub>1<\/sub> &#8211; \u03bc<sub>2<\/sub> and interpret it in context.<\/p>\n<h3><\/h3>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-566\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Concepts in Statistics. <strong>Provided by<\/strong>: Open Learning Initiative. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"http:\/\/oli.cmu.edu\">http:\/\/oli.cmu.edu<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/section>","protected":false},"author":163,"menu_order":26,"template":"","meta":{"_candela_citation":"[{\"type\":\"cc\",\"description\":\"Concepts in Statistics\",\"author\":\"\",\"organization\":\"Open Learning Initiative\",\"url\":\"http:\/\/oli.cmu.edu\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"}]","CANDELA_OUTCOMES_GUID":"42d99716-e4a1-4b31-ae10-22e50b365052","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-566","chapter","type-chapter","status-publish","hentry"],"part":474,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/chapters\/566","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/wp\/v2\/users\/163"}],"version-history":[{"count":3,"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/chapters\/566\/revisions"}],"predecessor-version":[{"id":1511,"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/chapters\/566\/revisions\/1511"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/parts\/474"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/chapters\/566\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/wp\/v2\/media?parent=566"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/pressbooks\/v2\/chapter-type?post=566"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/wp\/v2\/contributor?post=566"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-wmopen-concepts-statistics\/wp-json\/wp\/v2\/license?post=566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}