6. Calculate and interpret the sample correlation coefficient r, then test (same 5 steps) for the absence of correlation between extraction time and pressure of extracted gas at a= 0.05. (5 Marks)Question 3: Simple Linear Regression Analysis. (35 Marks) The following table shows data on X = pressure of extracted gas (microns) and Y = extraction time (min). Assume Y is normally distributed with constant variance o' for each x. 15 32 X 40 130 16 260 275 370 420 480 5 0 5 V 2.5 3.0 3.1 3.3 3.7 4.1 4.3 4.8 5.0 5.4