{"id":250,"date":"2022-06-16T18:11:48","date_gmt":"2022-06-16T18:11:48","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/alphamodule\/?post_type=chapter&#038;p=250"},"modified":"2022-06-16T18:13:02","modified_gmt":"2022-06-16T18:13:02","slug":"sampling-bias-learn-it-1","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/alphamodule\/chapter\/sampling-bias-learn-it-1\/","title":{"raw":"Sampling Bias: Learn It 1","rendered":"Sampling Bias: Learn It 1"},"content":{"raw":"<div class=\"textbox learning-objectives\">\r\n<h3>learning GOALS<\/h3>\r\n<ul>\r\n \t<li>Define sample vs. population.<\/li>\r\n \t<li>Identify the different sampling methods.<\/li>\r\n<\/ul>\r\n<\/div>\r\nIn the previous section,\u00a0<em>Random Sampling<\/em>, you learned that some sampling methods were biased, and can produced samples unrepresentative of the population from which they are selected.\u00a0In the\u00a0next\u00a0activity, you will need to be able to distinguish between a sample and a population and identify different sampling methods. Prepare for that now by formally defining the population and sample, then learning about four common sampling methods.\r\n<h2>Sampling Methods<\/h2>\r\nIn a moment, you'll learn about four sampling methods commonly used in research. It is important to note that not all statistical questions can be investigated using purely unbiased methods.\u00a0 Therefore, acknowledging\u00a0bias in the sampling method is crucial to interpreting the analysis. Before we introduce these methods, let's formally define what we mean by\u00a0populations and samples.\r\n<h3>Population vs. Sample<\/h3>\r\nIn the previous section,\u00a0<em>Random Sampling<\/em>, you identified populations and parameters from descriptions of studies. The population was the entire group of interest and the parameter was a numerical summary describing a characteristic of that group.\r\n\r\nIn real life, it is usually hard to collect data on an entire population. Therefore, samples are used in research studies to collect data to make inferences about a population. Collecting data from a sample is less time consuming and less costly than collecting data from an entire population.\r\n\r\nAnswer Questions 1 and 2 now to define the terms\u00a0<strong>population<\/strong> and <strong>sample.\u00a0<\/strong>\r\n<div class=\"textbox key-takeaways\">\r\n<h3>Question 1<\/h3>\r\nWhat is the entire group of individuals\/animals\/items that we want to draw conclusions about during a research study?\r\n<ol>\r\n \t<li>a) Population<\/li>\r\n \t<li>b) Sample<\/li>\r\n<\/ol>\r\n[reveal-answer q=\"338045\"]Hint[\/reveal-answer]\r\n[hidden-answer a=\"338045\"]See the text above for guidance.[\/hidden-answer]\r\n\r\n<\/div>\r\n<div class=\"textbox key-takeaways\">\r\n<h3>question 2<\/h3>\r\nWhat is the specific group of individuals\/animals\/items that we collect data from for a research study?\r\n<ol>\r\n \t<li>a) Population<\/li>\r\n \t<li>b) Sample<\/li>\r\n<\/ol>\r\n[reveal-answer q=\"414341\"]Hint[\/reveal-answer]\r\n[hidden-answer a=\"414341\"]See the text above for guidance.[\/hidden-answer]\r\n\r\n<\/div>","rendered":"<div class=\"textbox learning-objectives\">\n<h3>learning GOALS<\/h3>\n<ul>\n<li>Define sample vs. population.<\/li>\n<li>Identify the different sampling methods.<\/li>\n<\/ul>\n<\/div>\n<p>In the previous section,\u00a0<em>Random Sampling<\/em>, you learned that some sampling methods were biased, and can produced samples unrepresentative of the population from which they are selected.\u00a0In the\u00a0next\u00a0activity, you will need to be able to distinguish between a sample and a population and identify different sampling methods. Prepare for that now by formally defining the population and sample, then learning about four common sampling methods.<\/p>\n<h2>Sampling Methods<\/h2>\n<p>In a moment, you&#8217;ll learn about four sampling methods commonly used in research. It is important to note that not all statistical questions can be investigated using purely unbiased methods.\u00a0 Therefore, acknowledging\u00a0bias in the sampling method is crucial to interpreting the analysis. Before we introduce these methods, let&#8217;s formally define what we mean by\u00a0populations and samples.<\/p>\n<h3>Population vs. Sample<\/h3>\n<p>In the previous section,\u00a0<em>Random Sampling<\/em>, you identified populations and parameters from descriptions of studies. The population was the entire group of interest and the parameter was a numerical summary describing a characteristic of that group.<\/p>\n<p>In real life, it is usually hard to collect data on an entire population. Therefore, samples are used in research studies to collect data to make inferences about a population. Collecting data from a sample is less time consuming and less costly than collecting data from an entire population.<\/p>\n<p>Answer Questions 1 and 2 now to define the terms\u00a0<strong>population<\/strong> and <strong>sample.\u00a0<\/strong><\/p>\n<div class=\"textbox key-takeaways\">\n<h3>Question 1<\/h3>\n<p>What is the entire group of individuals\/animals\/items that we want to draw conclusions about during a research study?<\/p>\n<ol>\n<li>a) Population<\/li>\n<li>b) Sample<\/li>\n<\/ol>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q338045\">Hint<\/span><\/p>\n<div id=\"q338045\" class=\"hidden-answer\" style=\"display: none\">See the text above for guidance.<\/div>\n<\/div>\n<\/div>\n<div class=\"textbox key-takeaways\">\n<h3>question 2<\/h3>\n<p>What is the specific group of individuals\/animals\/items that we collect data from for a research study?<\/p>\n<ol>\n<li>a) Population<\/li>\n<li>b) Sample<\/li>\n<\/ol>\n<div class=\"qa-wrapper\" style=\"display: block\"><span class=\"show-answer collapsed\" style=\"cursor: pointer\" data-target=\"q414341\">Hint<\/span><\/p>\n<div id=\"q414341\" class=\"hidden-answer\" style=\"display: none\">See the text above for guidance.<\/div>\n<\/div>\n<\/div>\n","protected":false},"author":17533,"menu_order":11,"template":"","meta":{"_candela_citation":"[]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-250","chapter","type-chapter","status-publish","hentry"],"part":158,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/chapters\/250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/wp\/v2\/users\/17533"}],"version-history":[{"count":4,"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/chapters\/250\/revisions"}],"predecessor-version":[{"id":278,"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/chapters\/250\/revisions\/278"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/parts\/158"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/chapters\/250\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/wp\/v2\/media?parent=250"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/pressbooks\/v2\/chapter-type?post=250"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/wp\/v2\/contributor?post=250"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/alphamodule\/wp-json\/wp\/v2\/license?post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}