Sigmoid Curve: P (c) = 1/1+e-(c - 2) What is the independent variable? A) x B) P(c) C) c ---------------- What is the y-intercept? A) 1 B) 0.119 C) There isn’t one --------------- What is the range of P(c)? A) [0,5] B) [0.12,1]
One function that arises throughout biological applications is a sigmoidal curve. It often is the natural result of phenomena that are bounded between some minimum and maximum value. For example, population size that is bounded between 0 (you can’t have negative #s of individuals) and some maximal carrying-capacity. Or, as we will focus on here, the probability of having a heart attack P given a risk factor such as LDL level ‘bad cholestrerol’, c. Suppose LDL cholesterol is measured on a scale of 0 (low levels) to 5 (high levels), then...
Sigmoid Curve: P (c) = 1/1+e-(c - 2)
What is the independent variable?
A) x
B) P(c)
C) c
----------------
What is the y-intercept?
A) 1
B) 0.119
C) There isn’t one
---------------
What is the range of P(c)?
A) [0,5]
B) [0.12,1]
1)Intercept is a value of y at x=0 or c=0.
2)Range is values which a function attains.
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