Refer to Exercise 4.126 (p. 246) and the study of the wear-out failure time of used colored display panels purchased by an outlet store. Recall that prior to acquisition; the panels had been used for about one-third of their expected lifetimes. The failure times (in years) for a sample of 50 used panels are reproduced in the table. An SPSS printout of the analysis is shown below.
a. Locate a 95% confidence interval for the true mean failure time of used colored display panels on the printout.
b. Give a practical interpretation of the interval, part a.
c. In repeated sampling of the population of used colored display panels, where a 95% confidence interval for the mean failure time is computed for each sample, what proportion of all the confidence intervals generated will capture the true mean failure time?

0.01 1.21 1.71 2.30 2.96 0.19 1.22 1.75 2.30 2.98 0.51 1.24 1.77 2.41 3.19 0.57 1.48 1.79 2.44 3.25 0.70 1.54 1.88 2.57 3.31 0.73 1.59 1.90 2.61 1.19 0.75 1.61 1.93 2.62 3.50 0.75 1.61 2.01 2.72 3.50 1.11 1.62 2.16 2.76 3.50 1.16 1.62 2.18 2.84 3.50