Dear all

My name is sonny, I am a beginner for statistics and I have encountered difficulties to figure out the meanings of statistical tables attached below while I was reading some academic papers from university assignment. Regarding table 2, I know how to calculate mean and SD, but have no idea and confused for 1~9, and no idea what formula to calculate it, table 3, I totally lost about the formula of OLS, totally have no idea how the figures are calculated. Can anyone help me with this issues, you help will be highly appreciated. thank in advance.