1. If the quantitative variables X and Y have a strong and negative association, what is the most likely value of their linear correlation coefficient? 0.1644 O -0.4419 O -0.8572 O-3.411 O 0.9924 2. When constructing a 95% confidence interval for the difference of two population means with known population standard deviation using samples of sizes 24 and 30, the critical value used will be: O 1.645 O 2.069 2.045 1.960 1,00 16 0.95 0.05 O Impossible to determine with the information given. using a sample