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# ps4 - STAT 203 PROBLEM SET 4 Due date Thursday March 5(1...

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STAT 203 PROBLEM SET 4 Due date: Thursday, March 5. (1) The O-rings in the booster rockets used in space launching play an important part in preventing rockets from exploding. Probabilities of O-ring 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. 33-35) in Chatterjee, Handcock, and Simonoff (1995). Each flight has six O-rings 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 O-rings damaged (out of 6) and the temperature of the launch. (a) Fit a logistic regression connecting the probability of an O-ring 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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ps4 - STAT 203 PROBLEM SET 4 Due date Thursday March 5(1...

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