Based on the following calculator output, determine the inter-quartile range of the dataset. 
\text{1-Var-Stats}1-Var-Stats
\bar{x}=125. 857142857 
x
ˉ
 =125. 857142857
\Sigma x =881Σx=881
\Sigma x^2 =112997Σx 
2
 =112997
Sx =18. 7832245317Sx=18. 7832245317
\sigma x =17. 38988681σx=17. 38988681
n =7n=7
\text{minX} =91minX=91
\text{Q}_1 =116Q 
1
 
 =116
\text{Med} =128Med=128
\text{Q}_3 =140Q 
3
 
 =140
\text{maxX} =150maxX=150