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It clarifies the characteristics of data quality, provides a refined explanation for confidence interval calculations, and corrects the formulation of alternative hypotheses for statistical tests. Intended for candidates preparing for the CHDA examination, these updates ensure accuracy in study materials by offering verified answers and logical explanations for previously misstated questions. The document serves as a critical supplement to the AHIMA Press publication, enabling students to evaluate their mastery of health informatics, statistical analysis, and data quality standards with increased precision. It addresses specific questions numbered 11, 68, and 74, providing both the corrected options and the necessary theoretical grounding to support correct reasoning, thereby enhancing the overall reliability of the self-assessment process for exam participants.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/certified-health-data-analyst-exam-preparation-correction-notice/403084/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/certified-health-data-analyst-exam-preparation-correction-notice/403084.png","ImageObject",300,407,{"name":92,"@type":93},"McQueen","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-06","2026-09-27",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the correct answer for the data quality characteristics question?","Question",{"text":112,"@type":113},"The question regarding the characteristics of data quality was corrected; 'numeric' is identified as the intended correct answer rather than 'valid' among the options provided.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the confidence interval width change when decreasing the confidence level?",{"text":117,"@type":113},"A 90 percent confidence interval is narrower than a 95 percent confidence interval for the same sample, correcting the previous assertion that it would be wider.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the correct alternative hypothesis for comparing hospital ALOS to national ALOS?",{"text":121,"@type":113},"The correct alternative hypothesis for determining if a facility's ALOS is significantly less than the national average is μ1 \u003C μ2.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},403084,1790695644,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":8,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":81,"preview_page_count":4},5909890329169,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Corrections (as of 1/2018)  \nCertified Health Data Analyst (CHDA) Exam Preparation (AC400714) Practice Questions, number 11 (page 63 and 120):  \n11. Which of the following characteristics is NOT a characteristic of data quality?  \na. Granular  \nb. Valid  \nc. Precise  \nd. Current  \nAnswer is marked as:  \nc The 10 characteristics of data quality are: accuracy, accessibility, consistency, currency, granularity, precision, comprehensiveness, definition, relevancy, timeliness (LaTour et al. 2013, 175) .  \nAnswer choice b should be numeric, rather than valid, and this is the correct answer.  \nPractice Questions, number 68 (page 73 and 124)  \nIf a 95 percent confidence interval for a facility’s mortality rate is 5% +/-1% or (4%, 6%), would a  \n90 percent confidence interval for the same sample be:  \na. Wider  \nb. Narrower  \nc. The same width  \nd. Not enough information  \nAnswer is marked as a. Wider  \nCorrect answer should be b. Narrower  \nPractice Questions, number 74 (page 74 and 125):  \n74. We want to determine if Critical Care Hospital’s ALOS (μ1) for DRG XXX is significantly less than the national ALOS (μ2) for DRG XXX. The alternative hypothesis would be stated as:  \na. μ1 ≤ μ2  \nb. μ1 \u003C μ2  \nc. μ1 > μ2  \nd. μ1 = μ2  \nAnswer is marked as: a. μ1 ≤ μ2  \nCorrect answer should be: b. μ1 \u003C μ2","cbCais22JsIeEr03","https://ap.wps.com/l/cbCais22JsIeEr03","pdf",128427,"English","# Corrections for CHDA Exam Preparation\n## Question 11: Data Quality Characteristics\n## Question 68: Confidence Interval Comparison\n## Question 74: Alternative Hypothesis Formulation","[{\"question\":\"What is the correct answer for the data quality characteristics question?\",\"answer\":\"The question regarding the characteristics of data quality was corrected; 'numeric' is identified as the intended correct answer rather than 'valid' among the options provided.\"},{\"question\":\"How does the confidence interval width change when decreasing the confidence level?\",\"answer\":\"A 90 percent confidence interval is narrower than a 95 percent confidence interval for the same sample, correcting the previous assertion that it would be wider.\"},{\"question\":\"What is the correct alternative hypothesis for comparing hospital ALOS to national ALOS?\",\"answer\":\"The correct alternative hypothesis for determining if a facility's ALOS is significantly less than the national average is μ1 \\u003c μ2.\"}]","Certified Health Data Analyst Exam Preparation - Correction Notice | PDF",1790537203]