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安安鱼 · 2020年01月28日

问一道题:NO.PZ2020010304000054 [ FRM I ]

问题如下图:

1.75是查表所得吗?,1.75和均值是什么关系啊。

1 个答案

orange品职答疑助手 · 2020年02月04日

同学你好,这边是根据解析里的方程,把x分位数给求出来,分位数求出来就是1.75

我没理解同学你问的第二个问题呀(标准正态分布的均值是0)

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NO.PZ2020010304000054问题如下Suppose thfor a lineregression, estimation of slope is statehaving a one-sip-value of 0.04. Whes this mean?The p-value tells us the “probability of observing a test statistic this more extreme ththe one computefrom the observeta when the null hypothesis is true.” In other wor, if the estimate of the slope is true, then in a ranmizetrithe probability of getting a larger new slope estimate is 4%.Assuming a normstribution, this will corresponto the value of x thsolves the following equation:1 - Φ(x) = 0.04 Using the excel function NORMSINV gives x = 1.75. 老师,p value和a不都应该是在左边吗?概率累积函数P value左侧的面积才是p value对应的概率呀?

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