To determine if their $3\mathrm{.}00$

centimeter galvanized pipes are properly adjusted, Jackson Inc. has decided to use an x$$

$-$Chart which uses the range to estimate the variability in the sample.

Table

Control Chart

Step $5$ of $7$ : Use the following sample data, taken from the next time period, to determine if the process is $"$In Control" or "Out of Control".

Observations: $3\mathrm{.}02,3\mathrm{.}03,2\mathrm{.}98,3\mathrm{.}01,3,2\mathrm{.}96$

Sample Mean: $3$