average income vs life expectancy is life expectancy significant or insignificant what is the r value of a correlation test for a population? what does an insignificant slope mean what is the statistical significance of a regression test? how many times to r correlation what is the significance of the significance of linear regression? what is the correlation in statistics r = statistically significant how do you interpret lin reg what does the r value of Y mean how to interpret the correlation coefficient how does r value correlate with income lin-reg and r value which is an insignificant slope? what is the r value of the income and life expectancy why are the lin reg and the r correlation insufficient how to interpret average life expectancy ie average income vs life expectancy how significant is an r value