{"id":610,"date":"2024-06-19T09:05:37","date_gmt":"2024-06-19T06:05:37","guid":{"rendered":"https:\/\/sisu.ut.ee\/measurement\/self-test-7\/"},"modified":"2024-06-19T09:05:37","modified_gmt":"2024-06-19T06:05:37","slug":"self-test-7","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/measurement\/self-test-7\/","title":{"rendered":"Self-test 7"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam23\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-23\"><p>Here you can test your understanding of the performance characteristics of analytical procedures: precision, trueness, accuracy.<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-23\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"   watupro-question-id-84\">\n\t\t\t<div class=\"question-content\"><p><span class=\"watupro_num\">1. <\/span>What types of performance characteristics are described?<\/p>\n<ol>\n<li>Mean value of 6 measurement results of the same sample was 5.2 mg\/L, reference value was 5.0 mg\/l. <select name=\"gap_84_1\" class=\"watupro-gap answer answerof-84\"><option value=\"\"><\/option><option value=\"accuracy\">accuracy<\/option><option value=\"precision\">precision<\/option><option value=\"trueness\">trueness<\/option><\/select><\/li>\n<li>Standard deviation of the mean of 6 titration results of the same sample was 0.02 ml. <select name=\"gap_84_2\" class=\"watupro-gap answer answerof-84\"><option value=\"\"><\/option><option value=\"accuracy\">accuracy<\/option><option value=\"trueness\">trueness<\/option><option value=\"precision\">precision<\/option><\/select><\/li>\n<li>Repeatability of the method obtained as the pooled standard deviation from 127 measurement results. <select name=\"gap_84_3\" class=\"watupro-gap answer answerof-84\"><option value=\"\"><\/option><option value=\"precision\">precision<\/option><option value=\"trueness\">trueness<\/option><option value=\"accuracy\">accuracy<\/option><\/select><\/li>\n<li>Measurement uncertainty was estimated as \u00b10.2 mg\/l, k = 2. <select name=\"gap_84_4\" class=\"watupro-gap answer answerof-84\"><option value=\"\"><\/option><option value=\"accuracy\">accuracy<\/option><option value=\"precision\">precision<\/option><option value=\"trueness\">trueness<\/option><\/select><\/li>\n<li>Relative expanded uncertainty of the method is in the range of 0.9 \u2013 1.1%, k = 2, depending on measurement conditions. <select name=\"gap_84_5\" class=\"watupro-gap answer answerof-84\"><option value=\"\"><\/option><option value=\"trueness\">trueness<\/option><option value=\"accuracy\">accuracy<\/option><option value=\"precision\">precision<\/option><\/select><\/li>\n<li>Analyte loss occurs during sample pre-treatment, causing systematically lower results. Lowering of the results has been estimated to be on an average 5%. <select name=\"gap_84_6\" class=\"watupro-gap answer answerof-84\"><option value=\"\"><\/option><option value=\"trueness\">trueness<\/option><option value=\"accuracy\">accuracy<\/option><option value=\"precision\">precision<\/option><\/select><\/li>\n<\/ol>\n<input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"84\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType84\" class=\"answerTypeCnt1\" value=\"gaps\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-1\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-84\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn84\" class=\"liveResultBtn1 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(84, 1);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"   watupro-question-id-85\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">2. <\/span>Accuracy refers to difference between the measured value and true value.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"85\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType85\" class=\"answerTypeCnt2\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices85\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-85[]\" id=\"answer-id-296\" class=\"answer   answerof-85 \" value=\"296\"><label for=\"answer-id-296\" id=\"answer-label-296\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-85[]\" id=\"answer-id-297\" class=\"answer   answerof-85 \" value=\"297\"><label for=\"answer-id-297\" id=\"answer-label-297\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-2\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-85\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn85\" class=\"liveResultBtn2 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(85, 2);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-3\" style=\";\"><div id=\"questionWrap-3\" class=\"   watupro-question-id-86\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">3. <\/span>Trueness is an estimate of the difference between the mean of a large number of measured values and the true value.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_3\" value=\"86\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType86\" class=\"answerTypeCnt3\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices86\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-86[]\" id=\"answer-id-298\" class=\"answer   answerof-86 \" value=\"298\"><label for=\"answer-id-298\" id=\"answer-label-298\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-86[]\" id=\"answer-id-299\" class=\"answer   answerof-86 \" value=\"299\"><label for=\"answer-id-299\" id=\"answer-label-299\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-3\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-86\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn86\" class=\"liveResultBtn3 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(86, 3);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-4\" style=\";\"><div id=\"questionWrap-4\" class=\"   watupro-question-id-87\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">4. <\/span>Accuracy characterises the precision of a measurement result.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_4\" value=\"87\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType87\" class=\"answerTypeCnt4\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices87\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-87[]\" id=\"answer-id-300\" class=\"answer   answerof-87 \" value=\"300\"><label for=\"answer-id-300\" id=\"answer-label-300\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-87[]\" id=\"answer-id-301\" class=\"answer   answerof-87 \" value=\"301\"><label for=\"answer-id-301\" id=\"answer-label-301\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-4\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-87\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn87\" class=\"liveResultBtn4 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(87, 4);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-5\" style=\";\"><div id=\"questionWrap-5\" class=\"   watupro-question-id-88\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">5. <\/span>Accuracy characterises the random error of measurement.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_5\" value=\"88\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType88\" class=\"answerTypeCnt5\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices88\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-88[]\" id=\"answer-id-302\" class=\"answer   answerof-88 \" value=\"302\"><label for=\"answer-id-302\" id=\"answer-label-302\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-88[]\" id=\"answer-id-303\" class=\"answer   answerof-88 \" value=\"303\"><label for=\"answer-id-303\" id=\"answer-label-303\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-5\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-88\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn88\" class=\"liveResultBtn5 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(88, 5);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-6\" style=\";\"><div id=\"questionWrap-6\" class=\"   watupro-question-id-89\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">6. <\/span>Precision refers to the agreement between a measurement result and the reference value.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_6\" value=\"89\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType89\" class=\"answerTypeCnt6\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices89\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-89[]\" id=\"answer-id-304\" class=\"answer   answerof-89 \" value=\"304\"><label for=\"answer-id-304\" id=\"answer-label-304\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-89[]\" id=\"answer-id-305\" class=\"answer   answerof-89 \" value=\"305\"><label for=\"answer-id-305\" id=\"answer-label-305\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-6\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-89\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn89\" class=\"liveResultBtn6 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(89, 6);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-7\" style=\";\"><div id=\"questionWrap-7\" class=\"   watupro-question-id-90\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">7. <\/span>Reference value and true value are synonyms.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_7\" value=\"90\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType90\" class=\"answerTypeCnt7\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices90\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-90[]\" id=\"answer-id-306\" class=\"answer   answerof-90 \" value=\"306\"><label for=\"answer-id-306\" id=\"answer-label-306\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-90[]\" id=\"answer-id-307\" class=\"answer   answerof-90 \" value=\"307\"><label for=\"answer-id-307\" id=\"answer-label-307\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-7\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t\t\t\t\t<\/div>\t\n\t\t\t<\/div> \n\t   \t<p id=\"liveResBtn-90\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn90\" class=\"liveResultBtn7 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(90, 7);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-8\" style=\";\"><div id=\"questionWrap-8\" class=\"   watupro-question-id-91\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">8. <\/span>Precision characterises the scatter of replicate measurement results.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_8\" value=\"91\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType91\" class=\"answerTypeCnt8\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices91\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-91[]\" id=\"answer-id-308\" class=\"answer   answerof-91 \" value=\"308\"><label for=\"answer-id-308\" id=\"answer-label-308\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-91[]\" id=\"answer-id-309\" class=\"answer   answerof-91 \" value=\"309\"><label for=\"answer-id-309\" id=\"answer-label-309\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div>\t\t\t\t\t<div style=\"display:none;\" id=\"liveResult-8\">\t\t   \n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" 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