Please help me with my Statistics assignment. point l Prev cus Answers 00Underst
ID: 3201471 • Letter: P
Question
Please help me with my Statistics assignment.
point l Prev cus Answers 00UnderstR11 12028 there is a 73% chance a pclygraph test etector test) catch a person who is, in fact, ng. Further e, there is approximat y a 5% chance that the polygraph wi sted d y HIN: Leu nt per not lying. Ying PA end PDA end PIE) PAYPBI A Replacing AAC) by 1 PIA) givas AXA ALB Substiuule known values rur PIB). IA), dnd eta IA") into Uhe last equaliori dnd solve for RIA Round your driswer uu unu dekirndl plaues,) PKA) b) f the polygraph indicated that 60% of the cuestion: were answered with lies, what would You estimate for th actual pcrcentage cf lic:? Round your answer to en: decimal place) 50.4. X Need Help? ccuse someone of My N 0.2 LeLA Ask You TeachHExplanation / Answer
Solution:-
17)
a) P(+ /Condition present) = 0.4795
Total number of positive results = 70
Total number of condition presents = 146
Sensitivity of the test = 70/146 = 0.4795
b) P(- /Condition present) = 0.5205
Total number of negative results = 70
Total number of condition presents = 76
False negative rate = 76/146 = 0.5205
c) P(- /Condition absent) = 0.7182
Total number of negative results = 79
Total number of condition absents = 110
Specificity of the test = 79/110 = 0.7182
d) P(+ /Condition absent) = 0.2818
Total number of positive results = 31
Total number of condition absents = 110
False positive = 31/110 = 0.2818
e) P(Condition present and positive ) = 0.2734
Total number of conditition present and positives results = 70
Total number of patients = 256
Predictive value of the test = 70/256 = 0.2734
f) P(Condition prsent and negative ) = 0.2734
Total number of conditition present and negative results = 76
Total number of patients = 256
P(Condition prsent and negative )= 76/256 = 0.2734