Twelve$$ samples, each containing five$$ parts, were taken from a process that produces steel rods at Emmanual$$ Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results$$ were:

$$

Sample

Sample Mean$($in$.)$

Range$($in$.)$

Sample

Sample Mean$($in$.)$

Range$($in$.)$

$1$

$9\mathrm{.}604$

$0\mathrm{.}033$

$7$

$9\mathrm{.}603$

$0\mathrm{.}041$

$2$

$9\mathrm{.}600$

$0\mathrm{.}041$

$8$

$9\mathrm{.}607$

$0\mathrm{.}034$

$3$

$9\mathrm{.}591$

$0\mathrm{.}034$

$9$

$9\mathrm{.}593$

$0\mathrm{.}027$

$4$

$9\mathrm{.}606$

$0\mathrm{.}051$

$10$

$9\mathrm{.}603$

$0\mathrm{.}029$

$5$

$9\mathrm{.}595$

$0\mathrm{.}031$

$11$

$9\mathrm{.}603$

$0\mathrm{.}039$

$6$

$9\mathrm{.}599$

$0\mathrm{.}036$

$12$

$9\mathrm{.}606$

$0\mathrm{.}047$Twelve$$ samples, each containing five$$ parts, were taken from a process that produces steel rods at Emmanual$$ Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results$$ were:

$$

Sample

Sample Mean$($in$.)$

Range$($in$.)$

Sample

Sample Mean$($in$.)$

Range$($in$.)$

$1$

$9\mathrm{.}604$

$0\mathrm{.}033$

$7$

$9\mathrm{.}603$

$0\mathrm{.}041$

$2$

$9\mathrm{.}600$

$0\mathrm{.}041$

$8$

$9\mathrm{.}607$

$0\mathrm{.}034$

$3$

$9\mathrm{.}591$

$0\mathrm{.}034$

$9$

$9\mathrm{.}593$

$0\mathrm{.}027$

$4$

$9\mathrm{.}606$

$0\mathrm{.}051$

$10$

$9\mathrm{.}603$

$0\mathrm{.}029$

$5$

$9\mathrm{.}595$

$0\mathrm{.}031$

$11$

$9\mathrm{.}603$

$0\mathrm{.}039$

$6$

$9\mathrm{.}599$

$0\mathrm{.}036$

$12$

$9\mathrm{.}606$

$0\mathrm{.}047$v