Suppose you wish to analyze the proportion of audits that co…

Suppose you wish to analyze the proportion of audits that contain at least one finding.  A random sample of 200 audits found that 18 of the audits had at least one finding.  Which of the following is closest to the 99% confidence interval for the true proportion of all audits that contain at least one finding?

We are going to explore  overall happiness scores of countri…

We are going to explore  overall happiness scores of countries around the world, taking a variety of factors into consideration. The Happiness Score is knowsn to be associated with GDP per capita, social support, healthy life expectancy, freedom to make choices, generosity, and absence of corruption. The data set analyzed is the most recent World Happiness Report from 2019, which uses data from the life evaluation questions asked on the Gallup World Poll. This data continues to be recognized as an indicator for policy-making decisions within  governments and civil society around the world. Leading experts in fields such as economics, data analysis, psychology, and more have expressed how measurements of happiness can effectively be used to determine the progress of a nation.  Below we explore statistical association between Happiness score and various indicators of Happiness. The output from Linear Regression model is shown below. The value of statistic that captures % of variation in the dependent variable explained by the linear combination of independent variables is: