Question

q2. (sc.6.n.1.2)
why is it important for scientists to repeat an investigation many times?
to compare with laws instead of theories
to change the experiment until the hypothesis is proven correct
to make the process longer and more complicated
to confirm reliability and reduce the effect of errors

Explanation:

Repeating an investigation helps scientists ensure that results are not due to random errors or chance. It builds confidence in the findings by confirming reliability.

Answer:

To confirm reliability and reduce the effect of errors