Exercise 6-13 presented the joint temperatures of the O-rings (°F) for each test firing or actual launch of the space shuttle rocket motor. In that exercise you were asked to find the sample mean and sample standard deviation of temperature.

(a) Find the upper and lower quartiles of temperature.

(b) Find the median.

(c) Set aside the smallest observation ( and recompute the quantities in parts

(a) and (b). Comment on your findings.

How “different” are the other temperatures from this smallest value?

(d) Construct a box plot of the data and comment on the possible presence of outliers.