3. You will need to use the critical values of the correlation coefficient, r, table found in section 14.4 of the e-text to answer these problems. a) Is a correlation coefficient of r = 0.867 when n = 16 significant at the 5% level? Why or why not? b) Is a correlation coefficient of r=-0.209 when n = 100 significant at the 1% level? Why or why not?
n 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 25 30 35 40 45 50 60 70 80 r = 0.05 0.950 0.878 0.811 0.754 0.707 0.666 0.632 0.602 0.576 0.553 0.532 0.514 0.497 0.482 0.468 0.456 0.444 0.396 0.361 0.335 0.312 0.294 0.279 0.254 0.236 0.220 e = 0.01 0.999 0.959 0.917 0.875 0.834 0.798 0.765 0.735 0.708 0.684 0.661 0.641 0.623 0.606 0.590 0.575 0.561 0.505 0.463 0.430 0.402 0.378 0.361 0.330 0.305 0.286
3. You will need to use the critical values of the correlation coefficient, r, table found in section 14.4 of the e-text
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3. You will need to use the critical values of the correlation coefficient, r, table found in section 14.4 of the e-text
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