## Here is the data set "AlloyData", which studies the compressive
## strength of an alloy fastener used in aircraft construction.  The
## pressure loads x_1,...,x_{10} range from 2500 pounds per square inch
## to 4300 psi.  The number of fasteners tested and the number of
## failures are reported.
#
x     n   y
2500  50  10
2700  70  17
2900  100 30
3100  60  21
3300  40  18
3500  85  43
3700  90  54
3900  50  33
4100  80  60
4300  65  51