The data set contains the times of successive failures for the air conditioning system of each member in a fleet of 13 Boeing 720 jet aircrafts. The data frame has 213 rows and 1 column.

1 2 | ```
#Load this data set for subsequent analysis:
data(timesoffailure)
``` |

This data frame contains one column,

x: pooled failure times about 213 observations.

Proschan, F. (1963). Theoretical explanation of observed decreasing failure rate. Technometrics 5, 375–83.

1 2 3 | ```
#fit a finite exponential mixture model of order 2 to this data set.
data(timesoffailure)
pmle.exp(timesoffailure,2,1)
``` |

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