Second-order polynomial models:
A) always curve upward.
B) always curve downward.
C) can curve upward or downward depending on the data.
D) measure interaction between variables.
Question 2
Which of the following statements is true?
A) If the confidence interval estimate for the regression slope coefficient crosses over zero, the average change in y for a one-unit change in x may be zero.
B) If the regression slope coefficient is very close to zero, this means that the relationship between the x and y variables is statistically insignificant.
C) A statistically significant regression slope coefficient indicates that for a one-unit change in y there will be a positive change in x by an amount equal to the regression slope coefficient.
D) It is acceptable to make predictions for y using x values that are outside the range of the data that was used in the regression.
A sigmoid (cooperative) binding curve
An Inverted U Curve
How to evaluate the second order determinant
Marginal Supply - Demand Curve
Typical bacterial population growth curve showing the initial lag phase
The order of gene transfer in four Hfr strains