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What does it mean when positive predictive value of diagnostic test is 100 percent?
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∙ 11y ago
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∙ 11y ago
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If sensitivity and specificity remain constant what is the relationship of prevalence to predictive value positive and predictive value negative?
positive predictive value and negative predictive value wil not be affected.
What is the relationship between prevalence and sensitivity?
as prevalence increases sensitivity and positive predictive value increases, negative predictive value and specificity decreases.
What does it mean if you get a negative number when you calculate for percent error?
Depending on whether you subtract actual value from expected value or other way around, a positive or negative percent error, will tell you on which side of the expected value that your actual value is. For example, suppose your expected value is 24, and your actual value is 24.3 then if you do the following calculation to figure percent error:[percent error] = (actual value - expected value)/(actual value) - 1 --> then convert to percent.So you have (24.3 - 24)/24 -1 = .0125 --> 1.25%, which tells me the actual is higher than the expected. If instead, you subtracted the actual from the expected, then you would get a negative 1.25%, but your actual is still greater than the expected. My preference is to subtract the expected from the actual. That way a positive error tells you the actual is greater than expected, and a negative percent error tells you that the actual is less than the expected.
What is the formula for percent error?
The formula of percent error ispercent error= Your value/accepted value x 100------------The definition of error is: difference between the accepted true value and the measured value of a quantity or parameter. But this is the absolute error.The relative (percent error) is:(measured value - accepted true value) . 100/accepted true valueThis value is exprssed as a percentage - %.
Definition of percent of change?
Percent change is the extent to which something gains or loses value.
If sensitivity and specificity remain constant what is the relationship of prevalence to predictive value positive and predictive value negative?
positive predictive value and negative predictive value wil not be affected.
What is predictive theory?
Predictive theory states that a diagnostic value of a procedure is defined by several factors. These factors include sensitivity, specificity, predictive value and efficiency.
Does positive predictive value depend on prevalence of the disease?
yes
What is the relationship between prevalence and sensitivity?
as prevalence increases sensitivity and positive predictive value increases, negative predictive value and specificity decreases.
What does the medical abbreviation PPV mean?
Positive Pressure Ventilationpositive predictive value
What is the absolute value of 25 percent?
The absolute value of a positive number is the same as the number. So, the answer is 25%.
What percent of the Z value are positive?
The standard Normal distribution is symmetric about 0 and so 50% of the Z values are positive.
What percent is 75 increased to 350?
366.66666666666663 percent Detailed answer: Where: 75 is the old value and 350 is the new value. In this case we have a positive change (increase) of 366.66666666666663 percent because the new value is smaller than the old value.Detailed answer:
Can a probability assume a negative value?
No. Probability is always represented as a positive ratio/fraction/percent.
What is 75 increased to 350?
366.66666666666663 percent Detailed answer: Where: 75 is the old value and 350 is the new value. In this case we have a positive change (increase) of 366.66666666666663 percent because the new value is smaller than the old value.Detailed answer:
Can latitude and longitude predict weather?
They have no direct (causative) predictive value. They have an indirect association.
What is the value of X if 1 divided by X equals X percent?
' X ' is positive 10 or negative 10.
