The component masses, measured in grams, for factory $A$ and factory $B$ are displayed.
(i)[5]
Construct a back-to-back stem-and-leaf diagram to show the masses of the components produced in the two factories.
(ii)[3]
Calculate the median and interquartile range for the masses of the components produced in factory $B$.
(iii)[2]
Make two comparisons between the masses of the components produced in factory $A$ and those produced in factory $B$.
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