=+amplitude from cycles to failure. Fit an appropriate curve, investigate the quality of the fit, and predict amplitude when cycles to failure 5 5000.

Obs Cycfail Strampl Obs Cycfail Strampl 1 1326 .01495 11 7356 .00576 2 1593 .01470 12 7904 .00580 3 4414 .01100 13 79 .01212 4 5673 .01190 14 4175 .00782 5 29,516 .00873 15 34,676 .00596 6 26 .01819 16 114,789 .00600 7 843 .00810 17 2672 .00880 8 1016 .00801 18 7532 .00883 9 3410 .00600 19 30,220 .00676 10 7101 .00575