Question: use the wilcoxon signedrank test to test the hypothesis that...

Use the Wilcoxon signed-rank test to test the hypothesis that the median length of 12-year-old turbots is 73.5 cm.

Length (cm) 64 65   66   67   68   69   70 71 72 73 75 77 78 83

No. of fish    1     2 1    1   4    3   4     5 3 3     1    6     1     1