Dave s Automatic Door installs automatic garage door openers The following
Dave’s Automatic Door installs automatic garage door openers. The following list indicates the number of minutes needed to install 10 door openers: 28, 32, 24, 46, 44, 40, 54, 38, 32, and 42.
(a) Range,
(b) Arithmetic mean,
(c) Variance, and
(d) Interpret the statistics.

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