State True or False. Accuracy and precision can be used interchangeably.
L12 Reality check
Introduction to measurement errors and diagnostic test accuracy studies · L12 p.52–62
Marked 0 of 5
Tutor unlocks after you check
RC11 markL12 RC1 RC21 markL12 RC2 State True or False. Measurement errors can be random or systematic.
RC31 markL12 RC3 The 2x2 contingency table on the right provides the index test results and the reference standard results in a sample. The sensitivity of the index test is (all values rounded to two decimals):
Rows: Index test. Columns: Target condition (as per reference standard). Present Absent Total Positive TP29 FP16 45 Negative FN21 TN84 105 Total 50 100 150 RC41 markL12 RC4 The 2x2 contingency table on the right provides the index test results and the reference standard results in a sample. The specificity of the index test is (all values rounded to two decimals):
Rows: Index test. Columns: Target condition (as per reference standard). Present Absent Total Positive TP29 FP16 45 Negative FN21 TN84 105 Total 50 100 150 RC51 markL12 RC5 The 2x2 contingency table shows two independent observers of a wound for wound infection. The agreement between the two observers (in percentage and rounded to 0 decimals) is:
Rows: First observer. Columns: Second observer. Present Absent Total Present a48 b14 62 Absent c27 d267 294 Total 75 281 356