Answer:
a) 0.54
Step-by-step explanation:
The correlation coefficient can be found by taking square root of R-squared value and the sign of correlation coefficient can be assessed by considering the sign of slope value. So,
r²=28.8%=28.8/100=0.288
r=[tex]\sqrt{r^{2} }[/tex]=[tex]\sqrt{0.288}[/tex]=0.5367
By rounding to two decimal places the correlation coefficient
r=0.54
We can see that slope=0.4845 has positive sign so, the correlation coefficient contains the positive sign.
Hence the correlation coefficient r=0.54.
