price-to-sales呢？

问题如下：

Based on the output from with Logistic Regression 1, how will the change in the probability that an ETF will be a winning fund increase if one of the other independent variable values, except for net_assets, is decreased by one unit, holding all else constant?

选项：

The probability will increase, but not as much as with the price-to-earnings increasing by one unit.

The probability will increase more than the price-to-earnings increasing by one unit.

The probability will not increase.

解释：

B is correct. In the previous question, the price-to-earnings variable value and the coefficient are both positive. By increasing the variable value incrementally by one, we are increasing the overall positive value of the series of items in the exp function. Therefore, if we are reducing the product of a coefficient value pair that is negative, we are increasing the overall value of the series of items in the exp function.

The next step is to look to see how many negative coefficient and value products are in the series of items in the exp function, then calculate the coefficient value product, and compare them to the coefficient value product for the price-to-earnings variable.

Therefore, as the portfolio_bonds variable increases by one unit, it results in a larger increase in profit than the price-to-earnings variable (0.1113 versus 0.0292), since its product is larger than the price-to-earnings product increase by one unit.