求助以下U型关系调节的事后分析怎么做的文章来源《EVALUATING NOVELTY: THE ROLE OF PANELS IN THE SELECTION OF R&D PROJECTS》 CRISCUOLO et al. 2017
背景：调节变量workloads；自变量novel；因变量the predicted share of requested funding awarded
（1）Using the coefficient estimates from Model 7, we find that the shift to the right in the maximum is statistically significant at the 95% significance level when selectors’ workloads are equal to one standard deviation above the mean (z=–0.160, p<0.01).——求助这个z值是怎么算的？95%水平显著要怎么求？
（2）We also test whether the slope of the curve becomes steeper to the right of the maximum: the slope of the curve derived using a panel workload value equal to one standard deviation above the mean grows more negative as we move further to the right of the maximum. When the panel workload is high, the selectors grant a lower share of requested funding to projects that are more novel.——这个只需要看图得出吗？还是需要命令分析？
（3）In Figure 2b, we report the difference in the predicted share of requested funding awarded and the 90% confidence interval associated with such an increase in selectors’ workloads and find that this effect is statistically significant across the entire range of the project novelty variable. That is, the confidence interval surrounding the difference in predicted shares does not contain zero at any point across the range of the project novelty variable.——这个差异difference怎么得出的？