{"id":594,"date":"2024-06-19T08:54:48","date_gmt":"2024-06-19T05:54:48","guid":{"rendered":"https:\/\/sisu.ut.ee\/measurement\/self-test-4-1\/"},"modified":"2024-06-19T08:54:48","modified_gmt":"2024-06-19T05:54:48","slug":"self-test-4-1","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/measurement\/self-test-4-1\/","title":{"rendered":"Self-test 4.1"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam12\" 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-12\"><p>Here you can test your understanding of some important aspects of uncertainty estimation related to pipetting.<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-12\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"   watupro-question-id-41\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">1. <\/span>Is it a good idea to rinse the pipette before pipetting?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"41\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType41\" class=\"answerTypeCnt1\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices41\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-41[]\" id=\"answer-id-157\" class=\"answer   answerof-41 \" value=\"157\"><label for=\"answer-id-157\" id=\"answer-label-157\" class=\" answer\"><span><p>No<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-41[]\" id=\"answer-id-156\" class=\"answer   answerof-41 \" value=\"156\"><label for=\"answer-id-156\" id=\"answer-label-156\" class=\" answer\"><span><p>Yes<\/p><\/span><\/label><\/div><!-- end question-choices--><\/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-41\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn41\" class=\"liveResultBtn1 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(41, 1);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"   watupro-question-id-42\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">2. <\/span>Is it mandatory to always use pure water for pipette\u00a0calibration?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"42\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType42\" class=\"answerTypeCnt2\" value=\"radio\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices42\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-42[]\" id=\"answer-id-159\" class=\"answer   answerof-42 \" value=\"159\"><label for=\"answer-id-159\" id=\"answer-label-159\" class=\" answer\"><span><p>No<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-42[]\" id=\"answer-id-158\" class=\"answer   answerof-42 \" value=\"158\"><label for=\"answer-id-158\" id=\"answer-label-158\" class=\" answer\"><span><p>Yes<\/p><\/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-42\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn42\" class=\"liveResultBtn2 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(42, 2);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-3\" style=\";\"><div id=\"questionWrap-3\" class=\"   watupro-question-id-43\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">3. <\/span>What are the three main uncertainty sources by pipetting?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_3\" value=\"43\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType43\" class=\"answerTypeCnt3\" value=\"checkbox\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices43\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-43[]\" id=\"answer-id-163\" class=\"answer   answerof-43 \" value=\"163\"><label for=\"answer-id-163\" id=\"answer-label-163\" class=\" answer\"><span><p>Latitude of the location pipetting (is it done near the pole or near the equator) \u00a0<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-43[]\" id=\"answer-id-164\" class=\"answer   answerof-43 \" value=\"164\"><label for=\"answer-id-164\" id=\"answer-label-164\" class=\" answer\"><span><p>Uncertainty due to temperature difference during calibration and during measurement<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-43[]\" id=\"answer-id-162\" class=\"answer   answerof-43 \" value=\"162\"><label for=\"answer-id-162\" id=\"answer-label-162\" class=\" answer\"><span><p>Uncertainty of calibration (uncertainty of the position of the mark on the pipette)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-43[]\" id=\"answer-id-161\" class=\"answer   answerof-43 \" value=\"161\"><label for=\"answer-id-161\" id=\"answer-label-161\" class=\" answer\"><span><p>Uncertainty of the water density\u00a0<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-43[]\" id=\"answer-id-160\" class=\"answer   answerof-43 \" value=\"160\"><label for=\"answer-id-160\" id=\"answer-label-160\" class=\" answer\"><span><p>Repeatability<\/p><\/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-43\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn43\" class=\"liveResultBtn3 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(43, 3);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-4\" style=\";\"><div id=\"questionWrap-4\" class=\"   watupro-question-id-44\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">4. <\/span>What is standard uncertainty of repeatability if the individual measurement results are 4.55, 4.68, 4.57, 4.61, 4.78 and 4.49 mg\/l? Please present answer with 2 significant digits.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_4\" value=\"44\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType44\" class=\"answerTypeCnt4\" value=\"textarea\"><!-- end question-content--><\/div><div class=\"question-choices \" id=\"questionChoices44\"><p><input type=\"text\" name=\"answer-44[]\" id=\"textarea_q_44\" class=\"watupro-text\" value=\"\" size=\"60\"><\/p><!-- 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-44\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn44\" class=\"liveResultBtn4 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(44, 4);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-5\" style=\";\"><div id=\"questionWrap-5\" class=\"   watupro-question-id-45\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">5. <\/span>What is the repeatability standard uncertainty of the mean value of six measurement results 7.74, 7.96, 7.77, 7.84, 8.13 and 7.63 ppm? Please present answer with one significant digits.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_5\" value=\"45\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType45\" class=\"answerTypeCnt5\" value=\"textarea\"><!-- end question-content--><\/div><div class=\"question-choices \" id=\"questionChoices45\"><p><input type=\"text\" name=\"answer-45[]\" id=\"textarea_q_45\" class=\"watupro-text\" value=\"\" size=\"60\"><\/p><!-- 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-45\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn45\" class=\"liveResultBtn5 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(45, 5);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-6\" style=\";\"><div id=\"questionWrap-6\" class=\"   watupro-question-id-46\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">6. <\/span>What would you use as volumetric flask calibration standard uncertainty estimate if the tolerance written on the flask is \u00b1 0.08 ml? Please give the answer with 2 significant digits.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_6\" value=\"46\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType46\" class=\"answerTypeCnt6\" value=\"textarea\"><!-- end question-content--><\/div><div class=\"question-choices \" id=\"questionChoices46\"><p><input type=\"text\" name=\"answer-46[]\" id=\"textarea_q_46\" class=\"watupro-text\" value=\"\" size=\"60\"><\/p><!-- 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-46\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn46\" class=\"liveResultBtn6 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(46, 6);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-7\" style=\";\"><div id=\"questionWrap-7\" class=\"   watupro-question-id-47\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">7. <\/span>What would you use as the estimate of standard uncertainty due to chemical interference if it is known that the interference will not influence the result by more than \u00b10.5 mg\/kg? Please give the answer with 2 significant digits.<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_7\" value=\"47\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType47\" class=\"answerTypeCnt7\" value=\"textarea\"><!-- end question-content--><\/div><div class=\"question-choices \" id=\"questionChoices47\"><p><input type=\"text\" name=\"answer-47[]\" id=\"textarea_q_47\" class=\"watupro-text\" value=\"\" size=\"60\"><\/p><!-- 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-47\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn47\" class=\"liveResultBtn7 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(47, 7);\"><\/p>\n\t   <div class=\"watu-question \" id=\"question-8\" style=\";\"><div id=\"questionWrap-8\" class=\"   watupro-question-id-48\">\n\t\t\t<div class=\"question-content\"><div><span class=\"watupro_num\">8. <\/span>What is the standard uncertainty of standard solution concentration if the concentration on the label reads as (0.1067 \u00b1 0.0006) mg\/l (<em>k<\/em> = 2)?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_8\" value=\"48\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType48\" class=\"answerTypeCnt8\" value=\"textarea\"><!-- end question-content--><\/div><div class=\"question-choices \" id=\"questionChoices48\"><p><input type=\"text\" name=\"answer-48[]\" id=\"textarea_q_48\" class=\"watupro-text\" value=\"\" size=\"60\"><\/p><!-- 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\" 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-48\" style=\"clear:both;\"><input type=\"button\" id=\"liveResultBtn48\" class=\"liveResultBtn8 watupro-live-result-btn\" value=\"See Answer\" onclick=\"WatuPRO.liveResult(48, 8);\"><\/p>\n\t   <div style=\"display:none\" id=\"question-9\">\n\t<div class=\"question-content\">\n\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<\/div>\n<\/div>\n\n<br>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons12\">\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; 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