# R Dataset / Package Stat2Data / Orings

Submitted by pmagunia on March 9, 2018 - 1:06 PM
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## Orings

### Description

Number of damaged O-rings on space shuttle launches and launch temperature

### Format

A dataset with 24 observations on the following 2 variables.

 Temp Code for temperature (in degrees F): Above65 Below65 Failures Number of O-ring failures

### Details

The space shuttle Challenger explodes shortly after liftoff in 1987. The subsequent investigation focused on the failure of O-ring seals, which allowed liquid hydrogen and oxygen to mix and explode. These failures might be related to temperature at the launch site which was near freezing (32 degrees F) on that day. This dataset shows the number of O-ring failures on previous shuttle launches, along with an indicator for whether the temperature was above or below 65 degrees F.

### Source

Data can be found in "Risk analysis of the space shuttle: Pre-challenger prediction of failure" by Siddhartha R. Dalal, Edward B. Fowlke, and Bruce Hoadley in Journal of the American Statistical Association, Vol. 84, No. 408 (Dec. 1989), pp 945-957

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Dataset imported from https://www.r-project.org.