STAT 203 PROBLEM SET 4
Due date: Thursday, March 5.
(1) The Orings in the booster rockets used in space launching play an
important part in preventing rockets from exploding. Probabilities
of Oring failures are thought to be related to temperature. A de
tailed discussion of the background of the problem is found in the
Flight of the Space Shuttle Challenger (pp.
3335) in Chatterjee,
Handcock, and Simonoff (1995).
Each flight has six Orings that
could potentially be damaged in a particular flight. The data from
23 flights are given in the data file
Orings.txt
.
For each flight, we
have the number of Orings damaged (out of 6) and the temperature
of the launch.
(a) Fit a logistic regression connecting the probability of an Oring
failure with temperature. Interpret the coefficients.
(b) The data for Flight 18 that was launched when the launch
temperature was 75 was thought to be problematic, and was
deleted. Fit a logistic regression to the reduced data set, and
interpret the coefficients.
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 Spring '08
 KARAALI
 Statistics, Regression Analysis, Space Shuttle Challenger, Poisson regression model, American Football League

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