问题如下：
Suppose that for a linear regression, an estimation of slope is stated as having a one-sided p-value of 0.04. What does this mean?
选项：
解释：
The p-value tells us the “probability of observing a test statistic that is more extreme than the one computed from the observed data when the null hypothesis is true.” In other words, if the estimate of the slope is true, then in a randomized trial the probability of getting a larger new slope estimate is 4%.Assuming a normal distribution, this will correspond to the value of x that solves the following equation:
1 - Φ(x) = 0.04
Using the excel function NORMSINV gives x = 1.75.
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，解析里的什么方程啊，怎么求出1.75的
