{"id":40068,"date":"2024-08-09T07:22:37","date_gmt":"2024-08-09T07:22:37","guid":{"rendered":"https:\/\/analystprep.com\/study-notes\/?p=40068"},"modified":"2024-08-09T07:23:47","modified_gmt":"2024-08-09T07:23:47","slug":"type-i-and-type-ii-errors-in-manager-selection-process-2","status":"publish","type":"post","link":"https:\/\/analystprep.com\/study-notes\/cfa-level-iii\/type-i-and-type-ii-errors-in-manager-selection-process-2\/","title":{"rendered":"Type I and Type II Errors in Manager Selection Process"},"content":{"rendered":"<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/Ta6AcKxNJOQ\" width=\"611\" height=\"343\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>Candidates may remember their inferential statistics training from CFA Level I. This reading delves deeper into Type I and Type II errors within the context of hiring and firing investment managers. It&apos;s important to note that the null hypothesis presumes the manager lacks skill, doesn&apos;t meet expectations, or underperforms.<\/p>\n<p><strong>Null Hypothesis: Manager Underperforms<\/strong><\/p>\n<p><strong>Therefore, the two potential errors are:<\/strong><\/p>\n<ul>\n<li>Type I: Hiring or retaining a manager who later underperforms expectations. <em>Rejecting the null hypothesis when it is correct.<\/em> <\/li>\n<li>Type II: Not hiring or firing a manager who later outperforms or performs in line with expectations. <em>Not rejecting the null hypothesis when it is incorrect.<\/em><\/li>\n<\/ul>\n<p>Another, perhaps simpler and less scientific way to think about these errors is:<\/p>\n<ul>\n<li><strong>Type I:<\/strong> Keeping a bad manager.<\/li>\n<li><strong>Type II:<\/strong> Missing out on a good manager.<\/li>\n<\/ul>\n<p>Determining whether to avoid type I or type II errors in fund selection varies based on the fund sponsor&apos;s preferences. Many prefer steering clear of poor managers, in other words, avoiding type I errors. Here are a few reasons for this choice:<\/p>\n<ul>\n<li>Financial market participants psychologically try to avoid regret. Type I errors create explicit costs, while Type II errors create opportunity costs. Many individuals give excess weight to explicit costs in their decision-making processes.<\/li>\n<li>Type I errors are relatively simple to measure and are often directly linked to the decision maker&apos;s compensation. Type II errors are less likely to be measured since they represent a more nebulous opportunity cost. <\/li>\n<li>Type I errors are more noticeable because they bring not only the regret of a wrong decision but also the challenge of explaining it to the investor. In contrast, Type II errors are less conspicuous.<\/li>\n<\/ul>\n<p>While most investors often focus on type I errors, type II errors are also significant. Monitoring managers who were fired or overlooked can help fund sponsors identify weaknesses in their selection process.<\/p>\n<p>The impact of type I and type II errors is generally smaller in more efficient markets. Market efficiency, especially its tendency to mean-revert, influences the costs associated with these errors. For instance, in a mean-reverting market, firing an underperformer only to see them bounce back represents a Type I error. Conversely, a Type II error would involve retaining strong performers and avoiding managers with weaker short-term track records, which also incurs costs.<\/p>\n<blockquote>\n<h2>Question<\/h2>\n<p>Which of the following <em>most accurately<\/em> describes a type I error?<\/p>\n<ol type=\"A\">\n<li>Rejecting the null hypothesis when it is correct.<\/li>\n<li>Not rejecting the null hypothesis when it is incorrect.<\/li>\n<li>Not rejecting the null hypothesis with it is correct.<\/li>\n<\/ol>\n<p><strong>Solution<\/strong><\/p>\n<p><strong>The correct answer is A.<\/strong><\/p>\n<p>It describes a Type I error accurately. It occurs when a researcher or analyst incorrectly rejects the null hypothesis, which essentially means they conclude that there is a significant effect or difference when, in reality, there isn&apos;t one. This is also known as a <strong>&ldquo;false positive.&rdquo;<\/strong><\/p>\n<p><strong>B is incorrect.<\/strong> It describes the correct decision in hypothesis testing. When the null hypothesis is incorrect, you should indeed not reject it because you&apos;re essentially saying that the data doesn&apos;t provide enough evidence to support the alternative hypothesis. This is not a Type I error.<\/p>\n<p><strong>C is incorrect.<\/strong> It is describing the correct decision in hypothesis testing. When the null hypothesis is correct, you should not reject it because it means that the data doesn&apos;t provide enough evidence to support the alternative hypothesis. This is not a Type I error.<\/p>\n<p><em>Remember:<\/em><\/p>\n<p>The null hypothesis is that the manager has no skill.<\/p>\n<\/blockquote>\n<p><strong>Performance Measurement: Learning Module 2: Investment Manager Selection;<\/strong> Los 2(b) Contrast Type I and Type II errors in manager hiring and continuation decisions<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Candidates may remember their inferential statistics training from CFA Level I. This reading delves deeper into Type I and Type II errors within the context of hiring and firing investment managers. It&apos;s important to note that the null hypothesis presumes&#8230;<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[571],"tags":[],"class_list":["post-40068","post","type-post","status-publish","format-standard","hentry","category-cfa-level-iii","blog-post","no-post-thumbnail","animate"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Type I and Type II Errors in Manager Selection Process - CFA, FRM, and Actuarial Exams Study Notes<\/title>\n<meta name=\"description\" content=\"It&#039;s important to note that the null hypothesis presumes the manager lacks skill, doesn&#039;t meet expectations, or underperforms.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/analystprep.com\/study-notes\/cfa-level-iii\/type-i-and-type-ii-errors-in-manager-selection-process-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Type I and Type II Errors in Manager Selection Process - 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