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<p><span style="text-rendering: optimizeLegibility; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-variant-numeric: inherit; font-stretch: inherit; line-height: 25.6px; font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif; vertical-align: baseline;"><strong style="text-rendering: optimizeLegibility; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-size: inherit; line-height: 25.6px; font-family: 'Open Sans', Verdana, Arial, Helvetica, sans-serif; vertical-align: baseline;">Note:</strong><span style="text-rendering: optimizeLegibility; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; font-size: inherit; line-height: 25.6px; font-family: 'Open Sans', Verdana, Arial, Helvetica, sans-serif; vertical-align: baseline;"> </span>After watching the video below, please m</span><span style="text-rendering: optimizeLegibility; margin: 0px; padding: 0px; border: 0px; outline: 0px; font-variant-numeric: inherit; font-stretch: inherit; line-height: 25.6px; font-family: 'Open Sans', Verdana, Geneva, sans-serif, sans-serif; vertical-align: baseline;">ake sure to also complete the quiz for this module by clicking on the arrow at the bottom, or via the navigation ribbon above.</span></p>
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<h2 class="hd hd-2 unit-title">Quiz</h2>
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Question 1
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<h3 class="hd hd-3 problem-header" id="b770c43649e0447b9d0e4e8ac77a601e-problem-title" aria-describedby="block-v1:MITx+JPAL350x+3T2020+type@problem+block@b770c43649e0447b9d0e4e8ac77a601e-problem-progress" tabindex="-1">
Question 2
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<p>Specificity is</p>
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_0-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> A. The ability of a test to correctly identify those who do not actually have the disease
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_1-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> B. The ability of the test to correctly identify the true negatives
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_2-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> C. Equivalent to the prevalence
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_3" class="field-input input-radio" value="choice_3"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_3-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> D. An assessment of reliability
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_4" class="field-input input-radio" value="choice_4"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_4-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_4" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> E. The ability of the test to correctly identify true positives
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_5" class="field-input input-radio" value="choice_5"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_5-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_5" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> F. Both A and B
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<input type="radio" name="input_b770c43649e0447b9d0e4e8ac77a601e_2_1" id="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_6" class="field-input input-radio" value="choice_6"/><label id="b770c43649e0447b9d0e4e8ac77a601e_2_1-choice_6-label" for="input_b770c43649e0447b9d0e4e8ac77a601e_2_1_choice_6" class="response-label field-label label-inline" aria-describedby="status_b770c43649e0447b9d0e4e8ac77a601e_2_1"> G. Both A and E
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Question 3
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<p>A false negative is</p>
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<input type="radio" name="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1" id="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="5ecef4f4f2ad435f91e61aae4d035fa0_2_1-choice_0-label" for="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_5ecef4f4f2ad435f91e61aae4d035fa0_2_1"> Someone who truly has the disease and tests positive with the test of interest
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<div class="field">
<input type="radio" name="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1" id="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="5ecef4f4f2ad435f91e61aae4d035fa0_2_1-choice_1-label" for="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_5ecef4f4f2ad435f91e61aae4d035fa0_2_1"> Someone who truly has the disease and who tests negative with the test of interest
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<input type="radio" name="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1" id="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="5ecef4f4f2ad435f91e61aae4d035fa0_2_1-choice_2-label" for="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_5ecef4f4f2ad435f91e61aae4d035fa0_2_1"> Someone who truly does not have the disease and who tests negative with the test of interest
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<input type="radio" name="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1" id="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_3" class="field-input input-radio" value="choice_3"/><label id="5ecef4f4f2ad435f91e61aae4d035fa0_2_1-choice_3-label" for="input_5ecef4f4f2ad435f91e61aae4d035fa0_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_5ecef4f4f2ad435f91e61aae4d035fa0_2_1"> Someone who truly does not have the disease and who tests positive with the test of interest
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Question 4
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<p>The negative predictive value</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_2417d49309a042a4ba8a590a1c619f45_2_1">
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<input type="radio" name="input_2417d49309a042a4ba8a590a1c619f45_2_1" id="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="2417d49309a042a4ba8a590a1c619f45_2_1-choice_0-label" for="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_2417d49309a042a4ba8a590a1c619f45_2_1"> Is the probability that someone who tests negative actually doesn&#8217;t have the disease
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<input type="radio" name="input_2417d49309a042a4ba8a590a1c619f45_2_1" id="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="2417d49309a042a4ba8a590a1c619f45_2_1-choice_1-label" for="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_2417d49309a042a4ba8a590a1c619f45_2_1"> Is the probability that someone with a positive test result actually has the disease
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<input type="radio" name="input_2417d49309a042a4ba8a590a1c619f45_2_1" id="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="2417d49309a042a4ba8a590a1c619f45_2_1-choice_2-label" for="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_2417d49309a042a4ba8a590a1c619f45_2_1"> Is the proportion of the population who have the disease who are correctly identified by the test
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<input type="radio" name="input_2417d49309a042a4ba8a590a1c619f45_2_1" id="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_3" class="field-input input-radio" value="choice_3"/><label id="2417d49309a042a4ba8a590a1c619f45_2_1-choice_3-label" for="input_2417d49309a042a4ba8a590a1c619f45_2_1_choice_3" class="response-label field-label label-inline" aria-describedby="status_2417d49309a042a4ba8a590a1c619f45_2_1"> Is the % of false negatives
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Question 5
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<p>Sensitivity and specificity</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_3d13a2929b7f4f11a037a6d3168e7957_2_1">
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<input type="radio" name="input_3d13a2929b7f4f11a037a6d3168e7957_2_1" id="input_3d13a2929b7f4f11a037a6d3168e7957_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="3d13a2929b7f4f11a037a6d3168e7957_2_1-choice_1-label" for="input_3d13a2929b7f4f11a037a6d3168e7957_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_3d13a2929b7f4f11a037a6d3168e7957_2_1"> Is the only way to measure reliability
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<input type="radio" name="input_3d13a2929b7f4f11a037a6d3168e7957_2_1" id="input_3d13a2929b7f4f11a037a6d3168e7957_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="3d13a2929b7f4f11a037a6d3168e7957_2_1-choice_2-label" for="input_3d13a2929b7f4f11a037a6d3168e7957_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_3d13a2929b7f4f11a037a6d3168e7957_2_1"> Of a given test are not related
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Question 6
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<p>Reliability refers to</p>
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<input type="radio" name="input_5244cad4fb154a4695974b759f46d19c_2_1" id="input_5244cad4fb154a4695974b759f46d19c_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="5244cad4fb154a4695974b759f46d19c_2_1-choice_0-label" for="input_5244cad4fb154a4695974b759f46d19c_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_5244cad4fb154a4695974b759f46d19c_2_1"> The consistency of a measure
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<input type="radio" name="input_5244cad4fb154a4695974b759f46d19c_2_1" id="input_5244cad4fb154a4695974b759f46d19c_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="5244cad4fb154a4695974b759f46d19c_2_1-choice_1-label" for="input_5244cad4fb154a4695974b759f46d19c_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_5244cad4fb154a4695974b759f46d19c_2_1"> How close to the truth the measure is
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<input type="radio" name="input_5244cad4fb154a4695974b759f46d19c_2_1" id="input_5244cad4fb154a4695974b759f46d19c_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="5244cad4fb154a4695974b759f46d19c_2_1-choice_2-label" for="input_5244cad4fb154a4695974b759f46d19c_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_5244cad4fb154a4695974b759f46d19c_2_1"> How sensitive the measure is
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Question 7
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<p>Test retest reliability assesses</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1">
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<input type="radio" name="input_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1" id="input_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1-choice_1-label" for="input_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1"> Variation in measurements taken by a single person or instrument under the same conditions
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<input type="radio" name="input_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1" id="input_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1-choice_2-label" for="input_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_f242cb331bed4fdbb1c1e7a9ebe9eb3c_2_1"> Internal consistency
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Question 8
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<p>Inter-observer reliability</p>
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