Name: Drilling


Abstract: A mining engineer wanted to study the relationship between drilling depth and the time it took to drill an additional five feet for dry holes and wet holes.


Variables (column):

1.      Depth (feet)

2.      Time (minutes)

3.      Type (0=Dry, 1=Wet)


Possible Uses: Correlation, Multiple Regression, Independent Samples T Test



Penner, Ralph, and Donald Watts.  Mining Information.  The American Statistician, Vol. 45, No. 1 (Feb., 1991), pp. 4-9.  American Statistical Association.  <>


Levine, David, Patricia Ramsey, and Robert Smidt.  Applied Statistics for Engineers and Scientists.  Upper Saddle River, NJ: Prentice Hall 2001.