Which of the following statement regarding summarizing predictive power of logistic regression models is true? group of answer choices probability of correct classification always falls between sensitivity and specificity. sensitivity and specificity are only useful measures when there are only categorical predictors in the model. when picking a cut off value to convert estimated probability to a binary value, a larger cut off value will yield smaller specificity. roc curve method is less informative than comparing two pairs of sensitivity and specificity.

Lillypad toys is a manufacturer of educational toys for children. six months ago, the company's research and development division came up with an idea for a unique touchscreen device that can be used to introduce children to a number of foreign languages. three months ago, the company produced a working prototype, and last month the company successfully launched its new device on the commercial market. what should lillypad's managers prepare for next? a. increased competition from imitators b. a prolonged period of uncontested success c. a sharp decline in demand for the product d. a difficult struggle to move from invention to innovation