Question

As you can see I'm only missing a couple things on my answers please help! just on the last two and by the way I tried 10.60 and 10.607 as well as rounding those numbers but it doesn't seem to be the right answer. for #2 I tried 0.939 the answer is not correct.

Yes as the number of assemblers increases . so does the production c. Compute the correlation coefficient. (Negative amounts should be indicated by a minus sign. Round Sy Sy and rto 3 decimal places.) 13 X-X Y-Y 10 4 15 - 20 -11 (x-272 10 1 40 272 X-XX-2 164 25 6 150 190 850 10 230 47 X - 30 P - 170 sx = 11.58 Sy =

Answer 1

$\begin{tabular}{rrrrr} \hline X & Y & XY & XX & YY \\ \hline 2 & 13 & 26 & 4 & 169 \\ 4 & 22 & 88 & 16 & 484 \\ 1 & 6 & 6 & 1 & 36 \\ 5 & 25 & 125 & 25 & 625 \\ 3 & 19 & 57 & 9 & 361 \\ \hline \end{tabular} \\ \sum X =15.0, \sum Y =85.0\\ \sum XY =302.0, \sum XX =55.0, \sum YY =1675.0 \\s_y=7.5829 \\ r = \frac{n\sum XY -\sum X*\sum Y}{\sqrt{\left(n\sum X^2 -(\sum X)^2\right)\left(n\sum Y^2 -(\sum Y)^2\right)}} \\ r = \frac{5*302.0 - 15.0*85.0}{ \sqrt{(5*55.0 - 15.0^2)(5*1675.0 - 85.0^2)}} \approx 0.98$