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❤Oliva · 2023年11月29日

请问有讲解视频吗?

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NO.PZ202208220100000510

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:

A.

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

B.

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

C.

TTe probability will not increase.

解释:

B is correct. In the previous question, the price-to-earnings variable value and the coefffcient 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. TTerefore, if we are reducing the product of a coefffcient value pair that is negative, we are increasing the overall value of the series of items in the exp function. TTe next step is to look to see how many negative coefffcient and value products are in the series of items in the exp function, then calculate the coefffcient value product, and compare them to the coefffcient 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 profft 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.

请问有讲解视频吗?

1 个答案

品职助教_七七 · 2023年11月30日

嗨,爱思考的PZer你好:


本题为课后题的Module 4 Q11。可参考如下的课后题讲解:

直接听整个case或者单独选择Q11均可。

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2024-01-13 12:59 1 · 回答