PLEASE READ MY QUESTION BEFORE YOU JUST ANSWER,THANK YOU! Use the Mann-Whitney t

Question

PLEASE READ MY QUESTION BEFORE YOU JUST ANSWER,THANK YOU!

Use the Mann-Whitney test to determine if you can conclude on the basis of these data that the two populations represented differ with respect to average fasting plasma insulin level. MY QUESTION IS HOW DO I FIND "T" FROM THIS? When i run a Mann Whitney test on Minitab it is giving me a W value and the p value is incorrect. Please help me figure out why I am getting this info instead of the T value!?!?!?!

Correct answer:

R=29.5

p=0.0263

My Results:

W=92

p=0.015

controls   previous GDM
46.25   30.00
40.00   4125.00
31.25   56.25
38.75   45.00
41.25   46.25
38.75   46.25
40.00   31.25
30.00   56.25
51.25   61.25
32.50   50.00
43.75   53.75
   *       62.50

Explanation / Answer

Results for: Worksheet 2

MTB > Mann-Whitney 95.0 'control' 'gdm';
SUBC> Alternative 0.

Mann-Whitney Test and CI: control, gdm

N Median
control 11 40.00
gdm 12 48.13

Point estimate for ETA1-ETA2 is -10.00
95.5 Percent CI for ETA1-ETA2 is (-17.50,-1.25)
W = 95.5
Test of ETA1 = ETA2 vs ETA1 not = ETA2 is significant at 0.0267
The test is significant at 0.0263 (adjusted for ties)

control   gdm
46.25   30.00
40.00   41.25
31.25   56.25
38.75   45.00
41.25   46.25
38.75   46.25
40.00   31.25
30.00   56.25
51.25   61.25
32.50   50.00
43.75   53.75
62.50

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