17) Twenty (x,y) pairs of measurements were taken on a randomly chosen set of subjects to see if a linear relationship exists between student’s exam scores and the number of hours of sleep they had the night before. Use the following summary values to find β1-hat and it's standard error Sβ1:
SSxy = 354, SSxx = 74.55, SSyy = 2520.
A) 33.80; 0.791     B) 4.75; 0.791      C) 4.75; 28.97      D) 4.75; 0.846