Answer
$0.2619 \ in$
Work Step by Step
The mean is given by
$$
\frac{1}{6}\left(
0.2617\ in+ 0.2614\ in+ 0.2624\ in+ 0.2620\ in+ 0.2619\ in+
0.2617\ in
\right)
\\=0.2619 \ in
$$
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