Question $7(1$ point$)$

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Which one of the following statements about A$/$B testing is INCORRECT?

A$/$B testing can be used to test which webpage works better than another.

Randomization is required in the $\frac{A}{B}$ testing.

A$/$B testing can be challenging.

Practitioners always choose the option that performs the best in the A$/$B testing.

Intent$-$to$-$Treat analysis may need to use in the $\frac{A}{B}$ testing.